Non-Metal and their Compound Non-Metal and their Compound Posted on August 23, 2025August 23, 2025 By admin Non-Metal and their Compound Non-Metal and their Compound Non-Metal and their Compound Non-Metal and their Compound 1 / 331 Which of the following are called non-metals? (a) Those that do not behave like metals (b) Those that gain electrons to form anions (c) Those that lose electrons to form cations (d) Both a and b 2 / 331 2 Non-metals do not have a metallic luster because— (a) Non-metals do not have free electrons (b) Non-metals have very few free electrons (c) Non-metals are not solid (d) Non-metals are inactive to light 3 / 331 Q. Regarding non-metals, which one of the following is not correct? (a) Non-metals are neither malleable nor ductile (b) Non-metals are poor conductors of heat and also poor conductors of electricity (c) The density of non-metals is higher compared to metals (d) When non-metals are struck with a metal, no sound is produced 4 / 331 4. Non-metals are generally not hard, but diamond, though a non-metal, is very hard. The reason is— (a) It does not have free electrons (b) One plane cannot slide over another plane in it (c) The bonds between its atoms are quite weak (d) It does not have a lattice structure 5 / 331 5. Why do non-metals not conduct electricity? (a) They do not have free electrons like metals (b) They have free electrons like metals (c) They do not have core electrons like metals (d) They have core electrons like metals 6 / 331 6. With which of the following substances do non-metals not react chemically? (a) Oxygen (b) Chlorine (c) Water (d) Acid 7 / 331 7. Non-metals generally behave like— (a) Oxidizing agents (b) Reducing agents (c) Alkaline substances (d) None of these 8 / 331 Consider the following statements: Non-metals combine with oxygen to form acidic oxides. Non-metals never form basic (alkaline) oxides. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 9 / 331 Which of the following is a non-metal? (a) Fe (b) Cu (c) Al (d) Cl 10 / 331 Which of the following is not correct? (a) Metals and non-metals react with each other to form ionic compounds. (b) Non-metals react with each other to form covalent compounds. (c) Metals react with each other to form intermetallic compounds. (d) All of these 11 / 331 11.Which of the following has the highest melting and boiling point? (a) Phosphorus (b) Sulfur (c) Oxygen (d) Graphite 12 / 331 12.Which of the following is neither acidic nor basic? (a) Carbon monoxide (CO) (b) Nitrous oxide (N₂O) (c) Nitric oxide (NO) (d) All of these 13 / 331 13: Which of the following gases dissolves in water to form an acidic solution? (a) Carbon dioxide (b) Oxygen (c) Hydrogen (d) Nitrogen 14 / 331 14: Which of the following is an electronegative element? (a) Magnesium (b) Chlorine (c) Sodium (d) Potassium 15 / 331 16: Consider the following statements: Hydrogen was discovered by Henry Cavendish. Hydrogen was named by Henry Bessemer. Hydrogen is a diatomic molecule. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Only 3 (d) 1, 2, and 3 16 / 331 17: Hydrogen shows similarity with which of the following? (a) Alkali metals (b) Halogen elements (c) Both a and b (d) Alkaline earth metals 17 / 331 18: In the laboratory, when granular zinc reacts with dilute sulfuric acid, which gas is produced? (a) Hydrogen (b) Sulfur dioxide (c) Carbon monoxide (d) Oxygen 18 / 331 19: When zinc reacts with concentrated sulfuric acid instead of dilute sulfuric acid, which gas is produced? (a) Hydrogen (b) Sulfur dioxide (c) Carbon dioxide (d) Nitrogen 19 / 331 20: Pure zinc is not used in the laboratory for producing hydrogen gas. Why? (a) Pure zinc does not react with dilute H₂SO₄ (b) Pure zinc reacts with dilute H₂SO₄ very slowly (c) Pure zinc reacts with dilute H₂SO₄ very vigorously (d) None of these 20 / 331 21: Consider the following statements: The lightest element is hydrogen. The lightest gas is hydrogen. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 21 / 331 Regarding hydrogen, which of the following is not correct? (a) It is a colorless, odorless, and tasteless gas (b) It is the lightest substance (c) It is an inert gas (d) It is highly soluble in water 22 / 331 23: When hydrogen is burned in air— (a) Water is formed (b) Carbon dioxide is formed (c) It does not burn because hydrogen is non-combustible (d) Nitrogen is formed 23 / 331 24: The nature of hydrogen oxide (H₂O) is— (a) Acidic (b) Basic (c) Neutral (d) None of these 24 / 331 25: When superheated steam reacts with hot iron filings, which is obtained? (a) Hydrogen gas (b) Oxygen gas (c) Nitrogen gas (d) All of these 25 / 331 26: When superheated steam is passed over red-hot coke, which gas is obtained? (a) Producer gas (b) Water gas (c) Hydrogen gas (d) Oxygen gas 26 / 331 27: When sodium formate is heated, which gas is produced? (a) Hydrogen (b) Nitrogen (c) Oxygen (d) Chlorine 27 / 331 28: Which gas is used in the hydrogenation of oils? (a) Carbon dioxide (b) Carbon monoxide (c) Nitrogen (d) Hydrogen 28 / 331 29: As a result of the hydrogenation of oils— (a) Edible oils are converted into edible fats (b) Vegetable oils are converted into vegetable ghee (c) Unsaturated fats are converted into saturated fats (d) All of these 29 / 331 31: Metals like palladium and platinum can absorb a large volume of hydrogen under special conditions. What is the hydrogen absorbed by the metal called? (a) Absorbed hydrogen (b) Supersaturated hydrogen (c) Atomic hydrogen (d) Reactive hydrogen 30 / 331 30: Which of the following can absorb large volumes of hydrogen? (a) Platinum (b) Palladium (c) Colloidal palladium (d) All of these 31 / 331 32: Consider the following statements and select the correct ones using the given code: Some metals like platinum and palladium can occlude (absorb) large amounts of hydrogen. In these metals, occluded hydrogen comes out only when heated. Occluded hydrogen is less reactive compared to ordinary hydrogen. (a) 1 and 2 (b) Only 1 (c) 2 and 3 (d) Only 2 32 / 331 33: Which is called the fuel of the future? (a) Hydrogen (b) Nitrogen (c) Water gas (d) Solar radiation 33 / 331 34: Why is hydrogen called the fuel of the future? (a) Because hydrogen has the highest calorific value, a small amount can produce a large amount of energy. (b) Burning hydrogen in air produces only water, so it does not cause environmental pollution. (c) The largest source of hydrogen is water, which is a renewable natural resource. (d )all of them 34 / 331 35: Hydrogen is the fuel of the future, but at present, what is the biggest difficulty in using it as a fuel? (a) Production of hydrogen (b) Storage of hydrogen (c) Ignition temperature of hydrogen (d) Gaseous state of hydrogen 35 / 331 36: Water is an excellent solvent because its molecules— (a) Are inert (b) Have low mass (c) Are polar (d) Are highly polar 36 / 331 37: Which of the following is not correct? (a) At 0°C, the density of liquid water is higher than that of ice (b) The density of water is maximum at 4°C (c) At 4°C, the volume of water is maximum (d) None of these 37 / 331 38: Consider the following statements: Water is amphoteric; it behaves like both an acid and a base. Water behaves like both an oxidizing and a reducing agent. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 38 / 331 39: Water that does not easily form lather with soap is called— (a) Hard water (b) Soft water (c) Heavy water (d) None of these 39 / 331 40: Temporary hardness of water is caused by the presence of— (a) Calcium and magnesium chlorides (b) Calcium and magnesium sulfates (c) Calcium and magnesium bicarbonates (d) None of these 40 / 331 41: How can temporary hardness of water be removed? (a) By boiling the water (b) By Clark’s method (c) By Kelgaon’s method (d) Both a and b 41 / 331 42: How is permanent hardness of water removed? (a) By soda method (b) By Kelgaon’s method (c) By permutit (ion-exchange) method (d) All of these 42 / 331 43: By which of the following methods can both temporary and permanent hardness of water be removed? (a) Kelgaon’s method (b) Permutit method (c) Soda method (d) Ion-exchange method 43 / 331 44: How many isotopes does hydrogen have? (a) 3 (b) 4 (c) 5 (d) 6 44 / 331 45: Which isotope of hydrogen is called heavy hydrogen? (a) Protium (b) Deuterium (c) Tritium (d) None of these 45 / 331 46: Which of the following is not correct? (a) All three isotopes of hydrogen have the same atomic number (b) All three isotopes of hydrogen have similar chemical properties (c) All three isotopes of hydrogen have similar physical properties (d) All three isotopes of hydrogen do not have the same atomic mass 46 / 331 47: The rare and radioactive isotope of hydrogen is— (a) Hydrogen (b) Protium (c) Deuterium (d) Tritium 47 / 331 48: Radioactive tritium is— (a) Alpha emitter (b) Beta emitter (c) Gamma emitter (d) All of the above 48 / 331 49: What is the half-life of tritium? (a) 12.4 years (b) 11 years (c) 9.8 years (d) 2 years 49 / 331 50: Deuterium can be obtained by— (a) Reaction of water with sodium (b) Evaporation of heavy water (c) Electrolysis of heavy water (d) Condensation of ordinary hydrogen 50 / 331 51: Who first discovered deuterium (heavy hydrogen)? (a) Urey (b) Brickwedde (c) Murphy (d) All of these 51 / 331 52: Which of the following metals does not liberate hydrogen when reacting with dilute HCl? (a) Zinc (b) Copper (c) Sodium (d) Magnesium 52 / 331 53: Which of the following is used as a moderator in nuclear reactors? (a) Soft water (b) Heavy water (c) Hard water (d) Sea water 53 / 331 54: With which of the following does dilute HNO₃ react to produce hydrogen gas? (a) Aluminum (Al) (b) Manganese (Mn) (c) Iron (Fe) (d) Copper (Cu) 54 / 331 55: Heavy water can be obtained by— (a) Boiling water (b) Cooling water (c) Electrolyzing water for a long time (d) Heating H₂O₂ 55 / 331 56: Which of the following oxides reacts with dilute H₂SO₄ to produce hydrogen peroxide (H₂O₂)? (a) Na₂O₂ (b) NaO (c) MgO (d) Fe₂O₃ 56 / 331 57: How is hydrogen peroxide (H₂O₂) prepared in the laboratory? (a) By mixing MnO₂ in cold dilute H₂SO₄ (b) By adding P₂O₅ to acidic KMnO₄ (c) By adding Na₂O₂ to H₂O in boiling water (d) By dissolving BaO₂ in cold water and passing CO₂ through the solution 57 / 331 58: Commercial “10-volume H₂O₂” is a solution whose strength is— (a) About 30% (b) About 10% (c) About 3% (d) About 1% 58 / 331 59: Consider the following statements regarding heavy water: Deuterium oxide (D₂O) is called heavy water. Like ordinary water, heavy water is also a colorless liquid. Like ordinary water, heavy water also has maximum density at 4°C. (a) Only 1 (b) 1 and 2 (c) Only 2 (d) 2 and 3 59 / 331 60. बालों के ब्लीचिंग में प्रयुक्त होता है- (a) Heavy water (b) Hydrogen peroxide (c) Sulfuric acid (d) Oxalic acid (a) Heavy water (b) Hydrogen peroxide (c) Sulfuric acid (d) Oxalic acid 60 / 331 61: Which chemical is used to clean decayed materials or restore colors in old oil paintings? (a) Nitric acid (b) Sulfuric acid (c) Heavy water (d) Hydrogen peroxide 61 / 331 62: Why is sea water more saline than rainwater? (a) The environment around the sea is saline (b) Rivers flowing into the sea carry salts with them (c) There are salt-containing rocks under the sea (d) Marine organisms produce salts 62 / 331 63: How can pure water be obtained from sea water? (a) By condensation (b) By distillation (c) By evaporation (d) By fractional distillation 63 / 331 64: When water is heated from 0°C to 100°C, its density— (a) Increases up to 4°C and then decreases (b) Decreases up to 4°C and then increases (c) Increases with rising temperature (d) Decreases with rising temperature 64 / 331 65: When water is heated from 0°C to 100°C, its volume— (a) Increases up to 4°C and then decreases (b) Decreases up to 4°C and then increases (c) Increases with rising temperature (d) Decreases with rising temperature 65 / 331 66: Why does water have a higher boiling point compared to hydrogen sulfide (H₂S) or hydrogen chloride (HCl)? (a) Hydrogen bonding (b) Polar covalent ions (c) Van der Waals attraction (d) Dipole repulsion 66 / 331 68: Water is called heavy water when it contains— (a) Heavy isotope of hydrogen (b) Heavy isotope of oxygen (c) Number of hydrogen atoms in the molecule (d) Number of oxygen atoms in the molecule 67 / 331 69: In rural areas, water is disinfected by— (a) Potassium permanganate (b) Chlorine (c) Sodium chloride (d) Sodium sulfate 68 / 331 70: The specific density of D₂O (heavy water) is— (a) More than H₂O (b) Less than H₂O (c) Equal to H₂O (d) None of these 69 / 331 72: Consider the following statements: In the presence of potash alum, suspended impurities in water settle down. Adding chlorine or bleaching powder to water destroys harmful microorganisms. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 70 / 331 71: If a burning candle is placed in a jar of dry hydrogen gas, then— (a) The candle goes out (b) The candle burns more vigorously (c) Hydrogen burns but the candle goes out (d) There is no change in the candle 71 / 331 73: Potassium permanganate makes water— (a) Free from germs (b) Tasty (c) Transparent (d) Odorless 72 / 331 74: Which two reactants among the following will produce hydrogen gas? (a) Magnesium and hydrochloric acid (b) Copper and dilute nitric acid (c) Calcium carbonate and hydrochloric acid (d) Zinc and nitric acid 73 / 331 76: When hard water is completely evaporated, a white solid residue remains in the container. This is due to the presence of— Carbonates of Ca and Mg Sulfates of Ca and Mg Chlorides of Ca and Mg Choose the correct answer using the code given: (a) 1 and 2 (b) 1, 2 and 3 (c) Only 3 (d) 1 and 3 74 / 331 77. The purest form of water is— (a) Tap water (b) Rain water (c) Ground water (d) Distilled water 75 / 331 78. The reason why hydrogen is not found in the atmosphere is— (a) It is highly inflammable (b) It is the lightest gas (c) Plants absorb it (d) It immediately combines with oxygen to form water 76 / 331 79. In the conversion of vegetable oil into Dalda or Vanaspati ghee, which of the following process is used? (a) Hydrolysis (b) Oxidation (c) Ozonolysis (d) Hydrogenation 77 / 331 81. Who discovered heavy water (D₂O)? (a) Heinrich Hertz (b) Robert Boyle (c) H. C. Urey (d) Joseph Priestley 78 / 331 80. Which method is used in the industrial production of Vanaspati ghee? (a) Reduction (b) Oxidation (c) Ionization (d) Decomposition 79 / 331 82. Which group of the periodic table is called the Carbon family? (a) Group 17 (b) Group 16 (c) Group 15 (d) Group 14 80 / 331 84. Which of the following is the radioactive isotope of carbon? (a) ¹²C (b) ¹³C (c) ¹⁴C (d) None of these 81 / 331 83. Which of the following about carbon is NOT correct? (a) It is a non-metal element (b) Its atom has 6 protons, 6 neutrons, and 6 electrons (c) Carbon is an essential basic element of all organic compounds (d) Carbon is not found in the free state in nature 82 / 331 85. Consider the statements— The property of atoms of an element to bond with each other is called catenation. Catenation occurs only in carbon. Which are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 83 / 331 86. Which of the following elements forms the maximum number of compounds with hydrogen? (a) Nitrogen (b) Carbon (c) Silicon (d) Oxygen 84 / 331 87. The property due to which the same element is found in several forms is called— (a) Polymerization (b) Allotropy (c) Isomerism (d) Equivalence 85 / 331 89. Consider the statements— The chemical properties of different allotropes of the same element are different. The physical properties of different allotropes of the same element show some similarity. Which are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 86 / 331 88. Which of the following are allotropes of carbon? (a) Diamond (b) Graphite (c) Fullerene (d) All of these 87 / 331 90. Which of the following is NOT a crystalline allotrope of carbon? (a) Diamond (b) Graphite (c) Fullerene (d) Coal 88 / 331 92. Which of the following statements about diamond are correct? It is used as a gemstone in jewelry due to its ability to reflect light. It is a good conductor of electricity. It is used to cut glass, marble, and other hard materials. It is used for boring (drilling) through rocks. Choose the correct answer using the codes below: (a) 1, 3 and 4 (b) 2, 3 and 4 (c) 1, 2 and 3 (d) 2 and 4 89 / 331 91. Which of the following does not contain carbon? (a) Diamond (b) Graphite (c) Coal (d) Quartz 90 / 331 93. Which of the following is an element? (a) Sand (b) Diamond (c) Marble (d) Sugar 91 / 331 94. The purest form of carbon is— (a) Diamond (b) Graphite (c) Charcoal (d) Fullerene 92 / 331 95. Which of the following about diamond is NOT correct? (a) Diamond is the hardest substance and can easily cut glass. (b) Diamond has density 3.5 and refractive index 2.417. (c) It is inert and does not dissolve in any chemical solvent. (d) X-rays cannot pass through diamond. 93 / 331 96. Which of the following about the properties of graphite is NOT correct? (a) It is a black crystalline substance. (b) It is a good conductor of heat and electricity. (c) It is a very hard substance. (d) When rubbed on paper it leaves a black mark, which is why it is used in making pencils. 94 / 331 97. The positive rod of a dry cell is made of— (a) Copper (b) Graphite (c) Zinc (d) Brass 95 / 331 98. Which of the following is a good lubricant? (a) Diamond powder (b) Graphite powder (c) Molten carbon (d) Steel powder 96 / 331 99. Consider the statements— When diamond is heated at high temperature, CO is released and diamond is destroyed. When graphite is also heated at high temperature, CO is produced. Which of the above are NOT correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 97 / 331 100. To decolorize raw sugar, which of the following is used? (a) Wood charcoal (b) Coconut charcoal (c) Animal charcoal (d) Sugar charcoal 98 / 331 101. The use of diamond as a gemstone depends on which of its properties? (a) High value (b) Refractive index (c) Extreme hardness (d) Malleability 99 / 331 102. Corundum is chemically— (a) Calcium oxide (b) Calcium carbide (c) Silicon oxide (d) Silicon carbide 100 / 331 103. When diamond is heated up to 2000°C in the absence of air, the product obtained is— (a) Graphite (b) Diamond charcoal (c) Fullerene (d) Lampblack (soot) 101 / 331 104. What is the crystalline structure of graphite? (a) Regular tetrahedron (b) Hexagonal close-packed (c) Geodesic dome (d) None of these 102 / 331 105. Consider the statements— Passing steam over red-hot coke (carbon) produces water gas (CO + H₂). Passing CO₂ gas over red-hot carbon produces CO. Which are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 103 / 331 106. Which of the following statements about carbon monoxide (CO) is NOT correct? (a) It is a colorless, tasteless, and poisonous gas. (b) It is not a combustible gas. (c) It burns in air with a faint blue flame to give CO₂. (d) In the presence of sunlight, it reacts with Cl₂ to form carbonyl chloride (phosgene). 104 / 331 107. Which gas burns with a blue flame? (a) Hydrogen (b) Nitrogen (c) Carbon dioxide (d) Carbon monoxide 105 / 331 108. Carbon monoxide (CO) poisoning primarily affects— (a) Digestive system (b) Blood’s oxygen-carrying capacity (c) Liver (d) Kidneys 106 / 331 109. Consider the statements— Passing steam over red-hot coke produces producer gas. Passing air over red-hot coke produces water gas. Which are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 107 / 331 110. Which of the following air pollutants combines with hemoglobin more rapidly than oxygen? (a) PAN (Peroxyacetyl nitrate) (b) Carbon monoxide (c) Carbon dioxide (d) Ozone 108 / 331 111. Which of the following is NOT correct? (a) Burning carbon in sufficient air or oxygen produces carbon dioxide. (b) Burning carbon or carbon-containing fuels in insufficient air or oxygen produces carbon monoxide. (c) Carbon monoxide is a highly poisonous gas. (d) Carbon dioxide is also poisonous in nature. 109 / 331 112. What is the approximate concentration of carbon dioxide in the atmosphere? (a) 0.003% (b) 0.03% (c) 0.3% (d) 0.001% 110 / 331 113. Carbon dioxide gas reacts with water to form— (a) Carbonic acid (b) Carbolic acid (c) Carbamic acid (d) Sulfuric acid 111 / 331 114. Which gas is used in fire extinguishers? (a) Neon (b) Nitrogen (c) Carbon dioxide (d) Carbon monoxide 112 / 331 115. The presence of which causes lime water to turn milky when exposed to air? (a) Carbon dioxide (b) Nitrogen (c) Oxygen (d) Carbon monoxide 113 / 331 116. Which gas is dissolved under high pressure in soda water, beer, and other soft drinks? (a) O₂ (b) NH₃ (c) CO₂ (d) SO₂ 114 / 331 117. In the laboratory, when concentrated H₂SO₄ reacts with oxalic acid, which gas is produced? (a) CO (b) H₂CO₃ (c) SO₂ (d) SO₃ 115 / 331 119. In CO₂, the carbon is hybridized as— (a) sp³ (b) sp (c) sp² (d) d³sp³ 116 / 331 118. The chemical formula of carbon suboxide is— (a) CO (b) CO₂ (c) C₃O₂ (d) C₂O₃ 117 / 331 120. Which of the following gases dissolves in water to form an acidic solution? (a) Carbon dioxide (b) Oxygen (c) Nitrogen (d) Hydrogen 118 / 331 121. Graphene is— (a) An alloy of carbon (b) A nano-form of carbon (c) An isotope of carbon (d) An allotrope of carbon 119 / 331 122. Which of the following statements about graphite is NOT correct? (a) It is a crystalline allotrope of carbon. (b) It has very low thermal stability and low electrical and thermal conductivity. (c) It occurs in metamorphic rocks as a compound in sedimentary carbon. (d) It is used as electrodes and in high-temperature refractory applications. 120 / 331 123. The bubbles in champagne and soda are due to the presence of which gas? (a) Carbon dioxide (b) Hydrogen (c) Nitrogen (d) Oxygen 121 / 331 124. If there were no carbon dioxide in the Earth's atmosphere, the temperature of the Earth's surface would— (a) Depend on the amount of oxygen in the atmosphere (b) Increase compared to the present (c) Decrease compared to the present (d) Remain the same 122 / 331 125. Which of the following elements is used in solar cells? (a) Silicon (b) Cerium (c) Vanadium (d) Astatine 123 / 331 126. Quartz is formed from— (a) Calcium silicate (b) Calcium sulfate (c) Sodium sulfate (d) Sodium silicate 124 / 331 127. In nature, crystalline silica or silicon dioxide (SiO₂) is found in which form? (a) Quartz (b) Cristobalite (c) Tridymite (d) All of these 125 / 331 128. Which of the following is NOT a crystalline form of silica? (a) Quartz (b) Kieselgur (Diatomaceous earth) (c) Cristobalite (d) Tridymite 126 / 331 129. A small bag filled with silica gel is often found in bottles of tablets or powdered medicines because silica gel— (a) Destroys germs and microorganisms (b) Destroys microorganisms (c) Absorbs all gases present in the bottle (d) Absorbs moisture 127 / 331 130. Consider the statements— Silica (SiO₂) occurs in nature as the mineral quartz. The powdered form of quartz is called sand. Which of the above is NOT correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 128 / 331 131. What is the main component of air? (a) Nitrogen (b) Oxygen (c) Carbon dioxide (d) Hydrogen 129 / 331 132. Nitrogen gas— (a) Is lighter than air (b) Is heavier than air (c) Is equal to air (d) None of these 130 / 331 132. Who discovered nitrogen? (a) Chadwick (b) Rutherford (c) Cavendish (d) Ramsay 131 / 331 133. Which of the following statements about nitrogen gas is NOT correct? (a) Nitrogen is a colorless and odorless gas. (b) Nitrogen gas is chemically inert. (c) Nitrogen gas is poisonous. (d) Nitrogen gas neither burns nor supports combustion. 132 / 331 134. If a burning splint is placed in a jar filled with nitrogen, it— (a) Burns more intensely (b) Remains unchanged (c) Goes out (d) Burns slowly 133 / 331 135. The gas used in electric bulbs is— (a) Nitrogen (b) Hydrogen (c) Oxygen (d) Ammonia 134 / 331 136. For artificial insemination, bull semen is stored in— (a) Liquid oxygen (b) Liquid nitrogen (c) Liquid ammonia (d) Liquid hydrogen 135 / 331 137. Which gas is used in high-temperature thermometers? (a) Oxygen (b) Hydrogen (c) Nitrogen (d) Helium 136 / 331 138. Which of the following is a cryogenic liquid? (a) Liquid sulfur dioxide (b) Liquid ammonia (c) Dry ice (d) Liquid nitrogen 137 / 331 139. Which reaction occurs due to lightning? (a) Hydrogen and oxygen combine to form water, causing rain (b) Nitrogen reacts rapidly with hydrogen to form ammonia (c) Nitrogen and oxygen react to form nitrogen oxides (d) Solid water (ice) changes into vapor 138 / 331 140. During lightning in the sky, especially in the rainy season or other days, which gas is produced? (a) N₂O (b) NO₂ (c) N₂O₅ (d) NO 139 / 331 141. On a commercial scale, nitrogen is obtained by— (a) Liquefaction of air and fractional distillation (b) Heating a mixed solution of ammonium chloride and sodium nitride (c) Passing ammonia gas over red-hot cupric oxide (d) Passing chlorine gas through concentrated aqueous ammonia 140 / 331 142. Which of the following is an explosive compound of nitrogen? (a) NCl₃ (b) N₂O₅ (c) NH₃ (d) NF₃ 141 / 331 143. In flash bulbs, the magnesium wire is kept in an atmosphere of— (a) Hydrogen (b) Oxygen (c) Ozone (d) Nitrogen 142 / 331 144. Which of the following is a laughing gas that can cause death if inhaled excessively? (a) N₂O (b) NO (c) N₂O₃ (d) NO₂ 143 / 331 145. What is called laughing gas? (a) Nitric oxide (b) Nitrous oxide (c) Nitrogen dioxide (d) Nitrogen trioxide 144 / 331 146. Which of the following nitrogen oxides is colored? (a) N₂O (b) NO₂ (c) NO (d) N₂O₄ 145 / 331 148. An ordinary atmospheric gaseous pollutant was found to be very useful when produced in body cells. It helps in treating heart diseases and led to the development of the drug Viagra. The discovery earned scientists the 1998 Nobel Prize in Physiology or Medicine. Which gas is this? (a) Carbon monoxide (b) Nitrous oxide (c) Nitric oxide (d) Sulfur trioxide 146 / 331 147. A nitrogen molecule is chemically less reactive because there is what kind of bond between the two nitrogen atoms? (a) Single bond (b) Double bond (c) Triple bond (d) Coordinate bond 147 / 331 149. The name Haber is related to— (a) Activation energy (b) Gaseous dissolution (c) Octet rule (d) Ammonia synthesis 148 / 331 150. In the Haber process for ammonia synthesis, the suitable conditions are— (a) High pressure and low temperature (b) High pressure and high temperature (c) Low pressure and low temperature (d) Low pressure and high temperature 149 / 331 151. Ammonia is dried by— (a) Anhydrous CaCl₂ (b) Quicklime (CaO) (c) P₂O₅ (d) Concentrated H₂SO₄ 150 / 331 152. Which catalyst is used for ammonia production by the Haber process? (a) Finely divided iron with a small amount of molybdenum (b) Ferric oxide containing soda, silica, and potassium (c) Finely divided nickel (d) All of these 151 / 331 153. Which refrigerant is commonly used in domestic refrigeration? (a) Neon (b) Ammonia (c) Nitrogen (d) Freon 152 / 331 154. Why is ammonia used in refrigerators? (a) Ammonia is easily available and cheap (b) Ammonia cannot be easily liquefied (c) Ammonia can be easily liquefied, and cooling occurs due to the evaporation of liquid ammonia (d) Ammonia dissolves oily substances 153 / 331 155. Which of the following is a property of ammonia? (a) It is a colorless gas with a pungent smell (b) Causes tears when inhaled (c) It is lighter than air (d) All of these 154 / 331 156. Tear gas is— (a) Chlorine (b) Ammonia (c) Hydrogen carbide (Acetylene) (d) Hydrogen sulfide 155 / 331 158. Which of the following statements about the Haber process is NOT correct? (a) Nitrogen and hydrogen combine to form ammonia (b) The reaction is reversible (c) The reaction results in an increase in volume (d) The reaction is exothermic 156 / 331 157. Which of the following is highly soluble in water? (a) Carbon (b) Nitrogen (c) Iodine (d) Ammonia 157 / 331 159. The optimum temperature and pressure for ammonia production by the Haber process are— (a) 773 K and 200 atm (b) 873 K and 150 atm (c) 573 K and 400 atm (d) 673 K and 100 atm 158 / 331 160. Consider the following statements: When ammonia reacts with excess chlorine, yellow nitrogen trichloride (NCl₃) is obtained. Nitrogen trichloride is an explosive compound. Which of the above is correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 159 / 331 162. Which catalyst is used in ammonia production by the Haber process? (a) Iron (b) Platinum (c) Alumina (d) Nickel 160 / 331 163. An unknown gas dissolves rapidly in water. The aqueous solution of the gas turns red litmus blue. It also gives a white fume with HCl. This unknown gas is— (a) SO₂ (b) NH₃ (c) NO (d) CO 161 / 331 165. Ammonia gas gives white fumes with which of the following substances? (a) HNO₃ (b) H₂O (c) HCl (d) H₂SO₄ 162 / 331 166. Consider the following statements: Aqueous solution of ammonia is acidic. Aqueous solution of ammonium chloride is basic. Which of the above statements is NOT correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 163 / 331 167. What is the cause of lightning bolts in the atmosphere? (a) NH₄OH (b) NO (c) NH₃ (d) NH₂OH 164 / 331 Q.169. The modern method of industrial preparation of Nitric Acid (HNO₃) is – (a) Haber’s Process (b) Ostwald’s Process (c) Birkeland–Eyde Process (d) Cyanide Process 165 / 331 Q.170. The production of nitric acid by the Birkeland–Eyde process has now completely stopped, because – (a) In this process, nitric acid is obtained in very small quantity. (b) It requires very high electrical power. (c) Both (a) and (b) (d) Neither (a) nor (b) 166 / 331 Q.171. The chemical formula of Norwegian Saltpetre is – (a) KNO₃ (b) NaNO₃ (c) Ca(NO₃)₂ (d) Mg(NO₃)₂ 167 / 331 Q.172. In the industrial preparation of nitric acid by the Birkeland–Eyde process, the starting raw material is – (a) Air (b) Ammonia (c) Chile Saltpetre (d) NO₂ 168 / 331 Q.174. In the production of nitric acid by the Ostwald process, which catalyst is used? (a) Iron (b) Platinum (c) Nickel (d) Cadmium 169 / 331 Q.175. Which gas is dissolved in fuming nitric acid? (a) Ammonia (b) Nitrogen peroxide (NO₂) (c) Hydrogen (d) Oxygen 170 / 331 Q.177. Which of the following statements about Nitric Acid (HNO₃) is incorrect? (a) Pure nitric acid is a colorless, pungent fuming liquid. (b) It is hygroscopic and produces fumes in air. (c) It is a non-oxidizing agent. (d) It is soluble in water. 171 / 331 Q.176. For the preparation of nitrogen gas in the laboratory – (a) Magnesium nitrite is boiled with water (b) NH₄NO₂ is heated (c) Saturated solution of NH₄Cl and NaNO₂ is heated (d) NH₄Cl and CaO are heated 172 / 331 Q.180. The molecular formula of Phosphorus is – (a) P₁ (b) P₂ (c) P₃ (d) P₄ 173 / 331 Q.179. Which of the following properties is common to Hydrogen (H₂), Nitrogen (N₂), and Carbon Dioxide (CO₂)? (a) All are diatomic (b) All are gases at room temperature (c) All are colored (d) All have the same chemical reactivity 174 / 331 Q.181. Which of the following are tetraatomic molecules (P₄ type)? (a) Phosphorus (b) Arsenic (c) Antimony (d) All of these 175 / 331 Q.182. Industrial preparation of Phosphorus is done by heating which mixture in an electric furnace? (a) Bone ash, sodium chloride, and coke (b) Bone ash, silica, and coke (c) Bone ash, silica, and lime (d) Bone ash, coke, and limestone 176 / 331 Q.183. An element forms a solid oxide which dissolves in water to give an acidic solution. Which of the following can it be? (a) Oxygen (b) Potassium (c) Phosphorus (d) Sulfur (c) Phosphorus (d) Sulfur 177 / 331 Q.184. The most stable allotrope of Phosphorus is – (a) White or yellow phosphorus (b) Red phosphorus (c) Black phosphorus (d) Violet phosphorus 178 / 331 Q.185. Which allotrope of Phosphorus is the most reactive? (a) Violet phosphorus (b) Black phosphorus (c) Red phosphorus (d) Yellow or white phosphorus 179 / 331 Q.186. Which statement about white and red phosphorus is incorrect? (a) Both are soluble in carbon disulfide (CS₂) (b) Both can be oxidized by heating in air (c) Both have the same type of atoms (d) Both can be converted into each other 180 / 331 187.Which of the following about white phosphorus is NOT correct? (a) It is poisonous (b) It is a wax-like, soft, pale-yellow, translucent solid (c) It shows phosphorescence (glows in the dark) (d) It does not dissolve in CS₂ 181 / 331 188.Which allotrope of phosphorus is a conductor of electricity? (a) Red phosphorus (b) Black phosphorus (c) Scarlet (α-phosphorus) (d) Violet phosphorus 182 / 331 189. Yellow (white) phosphorus is kept preserved in which medium? (a) Kerosene oil (b) Water (c) Petrol (d) Air 183 / 331 190.In the manufacture of matches, which substance is used? (a) White phosphorus (b) Red phosphorus (c) Silicon (d) Selenium 184 / 331 191.Which allotrope of phosphorus shows the property of phosphorescence (glowing in dark)? (a) White phosphorus (b) Black phosphorus (c) Scarlet phosphorus (d) Red phosphorus 185 / 331 Q.192. White phosphorus reacts with hot and concentrated sodium hydroxide solution to form – (a) Phosgene (b) Phosphine (c) Phosphorus pentoxide (d) Phosphorus tetroxide 186 / 331 Phosgene is – (a) PH₃ (b) POCl₃ (c) COCl₂ (d) CS₂ 187 / 331 Phosphine is — (a) POCl₃ (b) CS₂ (c) COCl₂ (d) PH₃ 188 / 331 How is phosphine prepared in the laboratory? (a) By heating phosphorus in a stream of hydrogen (b) By heating white phosphorus with aqueous caustic soda (NaOH solution) (c) By decomposing PH₄I at 110 °C (d) By heating red phosphorus with aqueous caustic soda 189 / 331 Which of the following has a rotten fish-like smell? (a) Phosphine (b) Phosphorus dioxide (c) Phosphorus pentoxide (d) Phosphorus pentachloride 190 / 331 Powdered bird bones are used as fertilizer because they are rich in – (a) Nitrogen (b) Phosphorus (c) Potassium (d) Sodium 191 / 331 198.Which of the following is used to create a smoke screen in war? (a) PH₃ (b) PHA (c) PCl₃ (d) PCl₅ 192 / 331 199. The molecular structure of phosphine (PH₃) is similar to which of the following? (a) Water (H₂O) (b) Ammonia (NH₃) (c) Graphite (d) Diamond 193 / 331 200.The ordinary form of phosphorus is – (a) White or yellow phosphorus (b) Red phosphorus (c) Scarlet phosphorus (d) Black phosphorus 194 / 331 What is present on the tip of a matchstick? Cerese and glass powder White phosphorus Antimony trisulfide (Sb₂S₃) Potassium chlorate (KClO₃) Choose the correct combination: (a) 1, 3 & 4 (b) 2, 3 & 4 (c) 1, 2 & 3 (d) 1, 2, 3 & 4 195 / 331 Which of the following is a strong dehydrating agent? (a) Phosphorus trioxide (P₄O₆) (b) Phosphorus tetroxide (P₄O₈) (c) Phosphorus pentoxide (P₄O₁₀) (d) Phosphine (PH₃) 196 / 331 203. Which of the following is used to create smoke screens in riots and warfare? (a) Calcium phosphide (Ca₃P₂) (b) Calcium carbide (CaC₂) (c) Both a and b (c) Both a and b 197 / 331 204. Silicon doped with a small amount of phosphorus gives – (a) n-type semiconductor (b) p-type semiconductor (c) Both a and b (d) Neither a nor b 198 / 331 205.Which element is found in the largest amount on Earth? (a) Silicon (b) Oxygen (c) Nitrogen (d) Carbon 199 / 331 206.What is the approximate percentage of oxygen in the atmosphere? (a) 78% (b) 21% (c) 100% (d) 0.03% 200 / 331 Who discovered oxygen? (a) Rutherford (b) Davy (c) Priestley (d) Cavendish 201 / 331 From where does life-giving oxygen gas come? (a) Carbon dioxide (b) Carbonates absorbed in the soil (c) Metal oxides (d) Water 202 / 331 Consider the following statements: Oxygen is a combustible gas. Oxygen supports combustion. Which of the above is NOT correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 203 / 331 211.When a glowing splint is introduced into oxygen gas, it – (a) Goes out (b) Goes out and the gas starts burning (c) Catches fire rapidly (d) Both the splint and gas start burning 204 / 331 210.Which of the following gases supports combustion? (a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) Carbon monoxide 205 / 331 212.Which mixture of gases do divers use for breathing? (a) Oxygen and nitrogen (b) Oxygen and hydrogen (c) Oxygen and helium (d) Oxygen and argon 206 / 331 213. The oxygen used for artificial respiration in hospitals is a mixture of – (a) Oxygen and helium (b) Nitrogen and argon (c) Oxygen and argon (d) Oxygen and carbon dioxide 207 / 331 Oxygen gas is – (a) Colorless (b) Odorless (c) Tasteless (d) All of these 208 / 331 Which of the following metals absorbs oxygen at high temperature? (a) Gold (b) Platinum (c) Palladium ALL 209 / 331 Q.217.Which of the following is an acidic oxide? (a) P₂O₅ (b) CaO (c) Na₂O (d) FeO 210 / 331 218. Which of the following oxides is neutral? (a) CO (b) N₂O (c) NO (d) All of these 211 / 331 Who is considered the discoverer of oxygen? (a) Priestley (b) Scheele (c) Lavoisier (d) All of these 212 / 331 220.Which of the following compounds releases oxygen gas on strong heating? (a) KNO₃ (b) KClO₃ (c) KMnO₄ (d) All of these 213 / 331 221.Which of the following gases gives a reddish-brown solution when passed through alkaline pyrogallol? (a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) Hydrogen 214 / 331 222.Which element is present in the largest amount on the Earth's surface and in the human body? (a) Hydrogen (b) Oxygen (c) Carbon (d) Nitrogen 215 / 331 223. Oxygen (O₂) and ozone (O₃) are – (a) Isotopes (b) Isomers (c) Allotropes (d) Polymers 216 / 331 224.Who first identified ozone gas? (a) Schönbein (b) Priestley (c) Scheele (d) Lavoisier 217 / 331 225.What kind of smell does ozone gas have? (a) Rotten eggs (b) Rotten meat (c) Rotten fish (d) Mustard oil 218 / 331 226.Consider the following statements: Oxygen is paramagnetic. Ozone is also paramagnetic like oxygen. Which of the above is NOT correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 219 / 331 227. Which of the following gases blackens silver? (a) Ozone (b) Hydrogen (c) Oxygen (d) Carbon dioxide 220 / 331 228. At what concentration of ozone in the atmosphere does breathing cause headache and nausea? (a) 10 ppm (b) 50 ppm (c) 90 ppm (d) 100 ppm 221 / 331 229.Ozone gas is used in which of the following ways? (a) As a disinfectant (b) As a bleaching agent (c) To purify air in crowded places (d) All of these 222 / 331 230.The molecular formula of sulfur is – (a) S₂ (b) S₄ (c) S₆ (d) S₈ 223 / 331 231.Which is called the enemy of copper? (a) Sulfur (b) Carbon (c) Hydrogen (d) Nitrogen 224 / 331 232.By the Frasch Process, which of the following elements is extracted? (a) Phosphorus (b) Sulfur (c) Ozone (d) Carbon 225 / 331 233.The most common form of sulfur is – (a) Rhombic sulfur (b) Monoclinic or β-sulfur (c) Plastic sulfur (d) All of these 226 / 331 234.When boiling sulfur is poured into cold water, which form is obtained? (a) Monoclinic sulfur (b) Plastic sulfur (c) Prismatic sulfur (d) Milky sulfur 227 / 331 235.Which gas ignites by itself, does not support combustion, and gives a rotten egg smell? (a) Nitrogen (b) Oxygen (c) Carbon dioxide (d) Hydrogen sulfide 228 / 331 236.To make natural rubber stronger and more elastic, which of the following is added? (a) Chlorine (b) Bromine (c) Sulfur (d) Fluorine 229 / 331 237.What is the process called in which rubber is heated with sulfur to improve its quality? (a) Acceleration (b) Vulcanization (c) Sulfonation (d) Galvanization 230 / 331 238.When hydrogen sulfide gas is passed through an acidic solution of potassium dichromate, the color of the solution becomes – (a) Pink (b) Green (c) Orange (d) Blue 231 / 331 239.How is a polluted atmosphere cleaned? (a) Rain (b) Air (c) Oxygen (d) Nitrogen 232 / 331 240.What is the transition temperature from rhombic sulfur (α-sulfur) to monoclinic sulfur (β-sulfur)? (a) 369 K (b) 378 K (c) 493 K (d) 512 K 233 / 331 241.Which of the following is a pungent-smelling toxic gas? (a) Sulfur dioxide (SO₂) (b) Carbon dioxide (CO₂) (c) Carbon monoxide (CO) (d) Nitrous oxide (N₂O) 234 / 331 242.Which of the following statements about sulfur dioxide (SO₂) is NOT correct? (a) It is a colorless gas (b) It has a choking smell (c) It is heavier than air (d) It is insoluble in water 235 / 331 243.The aqueous solution of sulfur dioxide is – (a) Acidic (b) Basic (c) Amphoteric (d) Neutral 236 / 331 244.When sulfur dioxide is dissolved in water, which acid is formed? (a) Carbonic acid (b) Sulfurous acid (c) Sulfuric acid (d) Pyrosulfuric acid 237 / 331 245.Excess of which gas in the air causes leaves of trees to blacken and fall? (a) CO₂ (b) CO (c) SO₂ (d) NH₃ 238 / 331 247. When sulfur dioxide gas is passed through an acidic solution of potassium dichromate, the color of the solution becomes – (a) Green (b) Yellow (c) Purple (d) Pink 239 / 331 246.Which of the following gases is released from volcanoes? (a) Nitrogen (b) Hydrogen (c) Sulfur dioxide (d) Chlorine 240 / 331 248.Consider the following statements: When SO₂ gas is passed through an acidic solution of purple potassium permanganate, the solution becomes colorless. When SO₂ gas is passed through an acidic solution of orange potassium dichromate, the solution becomes green. Which of the above statements is correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 241 / 331 249.Sulfur dioxide is NOT used in which of the following ways? (a) As a bleaching agent (b) As antichlor (c) In refrigeration (d) In the production of nitric acid 242 / 331 251.Which is called the “King of Chemicals”? (a) Nitric acid (b) Ammonia (c) Nitrous acid (d) Sulfuric acid 243 / 331 252.Which of the following is the cheapest acid and is used in almost all industries? (a) Hydrochloric acid (b) Hydrofluoric acid (c) Sulfuric acid (d) Sulfurous acid 244 / 331 253.The industrial method for producing sulfuric acid is – (a) Lead chamber process (b) Contact process (c) Both of the above (d) None of these 245 / 331 254.In the Contact Process, which substance is produced? (a) Nitric acid (b) Oleum (c) Sulfuric acid (d) 20% H₂SO₄ 246 / 331 256.Nowadays, in the Contact Process for sulfuric acid production, vanadium pentoxide (V₂O₅) is preferred over platinum. Why? (a) Presence of V₂O₅ increases SO₃ yield to 97–98% (b) V₂O₅ is much cheaper than Pt (c) V₂O₅ is less toxic (d) All of these 247 / 331 257.Which acid is called Oil of Vitriol? (a) Nitric acid (b) Hydrochloric acid (c) Sulfurous acid (d) Sulfuric acid 248 / 331 258.Which of the following electrolytes is used in car batteries (lead-acid batteries)? (a) Sulfuric acid (b) Nitric acid (c) Hydrochloric acid (d) Sulfurous acid 249 / 331 259.When dilute sulfuric acid (H₂SO₄) reacts with zinc, iron, or magnesium, which gas is evolved? (a) Sulfur dioxide (b) Sulfur trioxide (c) Hydrogen sulfide (d) Hydrogen 250 / 331 Consider the following statements: Dilute sulfuric acid reacts with metals to liberate hydrogen gas. Concentrated sulfuric acid does not liberate hydrogen when reacting with metals. Which of the above statements is correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 251 / 331 261. Which acid is considered the "basic chemical" in the chemical industry? (a) H₂CO₃ (b) HNO₃ (c) HCl (d) H₂SO₄ 252 / 331 261. Which acid is considered the "basic chemical" in the chemical industry? (a) H₂CO₃ (b) HNO₃ (c) HCl (d) H₂SO₄ 253 / 331 262. When concentrated sulphuric acid is poured on sugar, it gets charred. In this process, sugar undergoes— (a) Dehydration (b) Oxidation (c) Reduction (d) Vulcanization 254 / 331 265. What is called Oleum? (a) Nitric acid (b) Sulphuric acid (c) Sulphurous acid (d) Fuming sulphuric acid 255 / 331 266. Which one of the following is NOT correct with reference to the properties of sulphuric acid? (a) It is a colorless and odorless oily liquid as a stable compound. (b) It is a highly corrosive acid. (c) It is a strong dehydrating agent. (d) When heated with formic acid, it produces carbon monoxide and carbon dioxide. 256 / 331 267. Which of the following acids is used in batteries? (a) Hydrochloric acid (b) Sulphuric acid (c) Hydrofluoric acid (d) Sulphurous acid 257 / 331 268. Concentrated sulphuric acid is highly corrosive. Which precaution should be taken while diluting it? (a) Always add acid to water (b) Always add water to acid (c) While adding water, the liquid should be stirred well (d) Both (a) and (c) 258 / 331 269. A gas turns lime water milky and makes potassium dichromate (K₂Cr₂O₇) paper green. This gas is— (a) CO (b) SO₂ (c) H₂S (d) CO₂ 259 / 331 270. In the laboratory, SO₂ gas is prepared by— (a) Cu + concentrated H₂SO₄ (b) Cu + dilute H₂SO₄ (c) Zn + dilute H₂SO₄ (d) Zn + concentrated H₂SO₄ 260 / 331 271. Which of the following pairs belong to the same group in the periodic table? (a) Elements with atomic numbers 17 and 38 (b) Elements with atomic numbers 17 and 53 (c) Elements with atomic numbers 11 and 33 (d) Elements with atomic numbers 20 and 40 261 / 331 272. In the periodic table, halogens are placed in the same group because— (a) They are electronegative (b) They are usually monovalent (c) Their atoms have seven electrons in the outermost shell (d) They are all non-metals 262 / 331 273. Which of the following is the most powerful oxidizing agent? (a) F₂ (b) Cl₂ (c) Br₂ (d) I₂ 263 / 331 274. The increasing order of electron affinity of chlorine, bromine, and iodine is— (a) Cl, Br, I (b) I, Br, Cl (c) I, Cl, Br (d) Br, Cl, I 264 / 331 275. Seaweeds are the chief source of— (a) Iron (b) Chlorine (c) Bromine (d) Iodine 265 / 331 276. Which element of Group-17 in the periodic table is the most unstable element? (a) Chlorine (b) Bromine (c) Iodine (d) Astatine 266 / 331 277. Which element is found in the least amount in the earth’s crust? (a) Manganese (b) Astatine (c) Chlorine (d) Magnesium 267 / 331 278. Which one of the following is NOT correct? (a) The elements of Group 17 of the periodic table are called halogens. (b) Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), and Astatine (At) are halogens. (c) Astatine is the only radioactive element among halogens. (d) Halogens are inert non-metals. 268 / 331 279. Which of the following gases is colored? (a) Oxygen (b) Hydrogen (c) Chlorine (d) Nitrogen 269 / 331 280. Consider the following statements: All halogens are colored. All halogens are yellow in color. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 270 / 331 282. Which of the following is found in solid state at normal temperature? (a) Chlorine (b) Iodine (c) Fluorine (d) Bromine 271 / 331 283. Which of the following non-metals is found in the liquid state? (a) Fluorine (b) Chlorine (c) Bromine (d) Iodine 272 / 331 284. Which of the following is the weakest acid? (a) HF (b) HCl (c) HBr (d) HI 273 / 331 285. Which of the following is used as a tear gas? (a) Hydrogen (b) Sulphur dioxide (c) Nitrogen (d) Chlorine 274 / 331 286. Which halogen member is used as a disinfectant? (a) Chlorine (b) Fluorine (c) Bromine (d) Iodine 275 / 331 287. The most commonly used bleaching agent is— (a) Alcohol (b) Chlorine (c) Bromine (d) Iodine 276 / 331 288. With reference to the bleaching properties of chlorine, which one is NOT correct? (a) Chlorine shows bleaching action in the absence of water. (b) Chlorine bleaches by oxidation. (c) The bleaching action of chlorine is permanent. (d) Chlorine is a strong bleaching agent. 277 / 331 289. For bleaching soft fabrics (like wool, silk), which is used? (a) Chlorine (b) Sulphur dioxide (c) Bleaching powder (d) Nitrogen 278 / 331 291. Consider the following statements: One halogen does not react with another halogen. When halogens react with each other, the compounds formed are called interhalogen compounds. Which of the above is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 279 / 331 292. Another name of hydrochloric acid is— (a) Picric acid (b) Gallic acid (c) Chloric acid (d) Muriatic acid 280 / 331 293. Which of the following acids produces white fumes with ammonia gas? (a) Sulphuric acid (b) Hydrochloric acid (c) Nitric acid (d) Sulphurous acid 281 / 331 294. Hydrofluoric acid is not kept in glass bottles because it reacts with— (a) Sodium oxide in glass (b) Aluminium oxide in glass (c) Silicon dioxide in glass (d) None of these 282 / 331 295. In which of the following acids is glass soluble? (a) H₂SO₄ (b) HNO₃ (c) HClO₄ (d) HF 283 / 331 296. Which of the following non-metal elements has metallic luster? (a) Iodine (b) Sulphur (c) Phosphorus (d) Boron 284 / 331 297. To prevent malfunctioning of the thyroid, iodized salt is generally given in the form of— (a) Sodium iodate (b) Potassium iodate (c) Magnesium iodate (d) Potassium iodide 285 / 331 299. The acid used in etching of glass is— (a) Sulphuric acid (b) Perchloric acid (c) Nitric acid (d) Hydrofluoric acid 286 / 331 298. Chlorine makes colored flowers colorless because it is— (a) Acidic (b) Oxidizing (c) Reducing (d) Air pollutant 287 / 331 300. Phosgene is— e (a) Carbonyl chloride (b) Phosphorus trichloride (c) Phosphorus pentachloride (d) None of these 288 / 331 301. In the industrial production of sodium hydroxide, the by-product is— (a) Oxygen (b) Chlorine (c) Sodium carbonate (d) Sodium chloride 289 / 331 302. By the Deacon’s process, which is obtained? (a) Chlorine (b) Nitric acid (c) Sulphuric acid (d) Ammonia 290 / 331 304. The color of iodine solution disappears when shaken with which of the following substances? (a) NaCl (b) Na₂SO₄ (c) Na₂S₂O₃ (d) Na₂O₂ 291 / 331 303. Which of the following poisonous gases are produced using chlorine? (a) Phosgene (b) Tear gas (c) Mustard gas (d) All of these 292 / 331 305. On adding which of the following to KBr solution will bromine be produced? (a) Cl₂ (b) HI (c) I₂ (d) SO₂ 293 / 331 306. HCl के जलीय विलयन के विद्युत अपघटन से प्राप्त होती है— (a) कैथोड पर H₂ गैस (b) एनोड पर H₂ गैस (c) कैथोड पर Cl₂ गैस (d) एनोड पर Cl₂ व O₂ गैस 294 / 331 307. The elements of group 18 in the periodic table are called— (a) Rare Gas (b) Inert Gas (c) Noble Gas (d) All of these 295 / 331 308. Regarding inert gases, which of the following is NOT correct? (a) All inert gases are monoatomic, so their atomic mass and molecular mass are the same. (b) All these gases are colorless, odorless, and tasteless. (c) All these gases are highly soluble in water. (d) A special property of all these gases is that they can diffuse through substances like rubber, plastic, and glass. 296 / 331 310. Among the naturally occurring elements, which element has the lowest boiling point? (a) Helium (b) Hydrogen (c) Nitrogen (d) Oxygen 297 / 331 311. The electronic configuration of the outermost shell of a noble gas is— (a) ns¹ np⁵ (b) ns² np⁷ (c) ns¹ np⁷ (d) ns² np⁶ 298 / 331 312. Which of the following is the lightest and non-combustible gas? (a) Hydrogen (b) Helium (c) Argon (d) Radon 299 / 331 313. In the spectrum of the Sun’s chromosphere, the bright yellow line observed and called the D-line indicates the presence of which element? (a) Sodium (Na) (b) Argon (Ar) (c) Helium (He) (d) Hydrogen (H) 300 / 331 314. Which of the following elements has the highest ionization potential? (a) Hydrogen (H) (b) Helium (He) (c) Fluorine (F) (d) Chlorine (Cl) 301 / 331 315. The gas used in colored discharge tubes in advertisements is— (a) Xenon (Xe) (b) Krypton (Kr) (c) Helium (He) (d) Neon (Ne) 302 / 331 316. Which noble gas forms the maximum number of compounds? (a) Xe (b) Kr (c) Ne (d) Rn 303 / 331 317. Which gas is filled in airplane tires? (a) Hydrogen (b) Nitrogen (c) Helium (d) Argon 304 / 331 318. Which gas is filled in balloons? (a) Helium (b) Hydrogen (c) Krypton (d) Radon 305 / 331 319. Who first prepared a compound of xenon, thereby ending the myth that noble gases cannot form compounds? (a) Niels Bartlett (b) Rayleigh (c) Ramsay (d) Wöhler 306 / 331 320. Which noble gas compound was first prepared by Bartlett? (a) Helium (He) (b) Neon (Ne) (c) Argon (Ar) (d) Xenon (Xe) 307 / 331 321. For which reason is it said that "Chemistry of the noble gases is the chemistry of Xenon"? (a) Only xenon among noble gases has been extensively studied chemically (b) Xenon is the rarest among noble gases (c) Xenon is the most inert among noble gases (d) Only xenon among noble gases can form compounds 308 / 331 322. Which of the following statements is correct? (a) Among noble gases, only radon is radioactive (b) Radon is obtained from the decay of radium (c) Except radon, all noble gases are components of the atmosphere (d) All of these 309 / 331 323. Which of the following elements exhibits only one oxidation state besides zero? (a) Cl₂ (b) F₂ (c) Br₂ (d) I₂ 310 / 331 324. Noble gases do not react with other elements because— (a) They are monoatomic (b) Their atoms are very small (c) They are not found in large amounts (d) Their outermost shell is completely filled 311 / 331 325. For meteorological observations, which of the following gases is used to fill balloons? (a) Oxygen (b) Helium (c) Methane (d) Hydrogen 312 / 331 326. The outermost shell of a noble gas— (a) Is completely filled (b) Has two electrons (c) Has eight electrons (d) Has one electron 313 / 331 327. Noble gases are inert because— (a) Their electronic configuration is stable (b) Their ionization potential is high (c) Both (a) and (b) (d) Neither (a) nor (b) 314 / 331 328. Noble gases are very slightly reactive. What is the reason for this? (a) The valence shell of noble gases is completely filled. (b) Due to their high ionization enthalpy, the tendency to lose electrons and form cations is very low. (c) The tendency to gain electrons and form anions is also very low. (d) All of these 315 / 331 329. Who is credited with the discovery of noble gases? (a) Rayleigh (b) Scheele (c) Cavendish (d) Priestley 316 / 331 330. After the discovery of noble gases by Rayleigh and Ramsay, what was suggested about their placement in the periodic table? (a) Place them with hydrogen (b) Place them with alkali metals (c) Place them with halogen elements (d) Create a new group and add it to the periodic table 317 / 331 331. Which of the following has the highest percentage in air? (a) Argon (Ar) (b) Helium (He) (c) Neon (Ne) (d) Krypton (Kr) 318 / 331 332. Who discovered helium? (a) Henry Cavendish (b) Scheele and Priestley (c) Berzelius (d) Lockyer 319 / 331 333. Normally, a liquid flows from a higher level to a lower level. Which of the following liquids can rise upwards when placed in a glass? (a) Liquid helium (b) Liquid hydrogen (c) Petrol (d) Water 320 / 331 334. Helium is preferred over hydrogen in air-filled balloons because— (a) Helium is cheaper (b) Helium is relatively less dense (c) Helium is more powerful than hydrogen (d) Helium does not form an explosive mixture with air 321 / 331 335. Which noble gas can form compounds? (a) Krypton (b) Xenon (c) Argon (d) Radon 322 / 331 336. Which halogen forms the maximum number of compounds with xenon? (a) Fluorine (b) Chlorine (c) Bromine (d) Iodine 323 / 331 337. Which noble gas is present in the highest amount in the atmosphere? (a) Helium (b) Neon (c) Argon (d) Krypton 324 / 331 338. Which gas is usually filled in a tube light? (a) Argon + Phosphine (b) Mercury vapor + Argon (c) Argon + Methane (d) Mercury vapor + Helium 325 / 331 339. Which gas is used in an electric bulb? (a) Nitrogen (b) Hydrogen (c) Oxygen (d) Inert gas 326 / 331 340. The nucleus of helium contains— (a) One proton and two neutrons (b) Only one proton (c) Only two protons (d) Two protons and two neutrons 327 / 331 341. Which noble gas is used in the treatment of cancer? (a) Helium (b) Radon (c) Argon (d) Xenon 328 / 331 342. Which of the following is also called a “stranger gas”? (a) Argon (b) Xenon (c) Neon (d) Radon 329 / 331 343. The main source of helium is— (a) Air (b) Monazite (c) Radium (d) Water 330 / 331 344. Which gas is used to produce a flash in modern photography? (a) Xenon (b) Neon (c) Argon (d) Helium 331 / 331 345. Consider the following statements: When Mendeleev arranged elements in the periodic table, noble gases had not yet been discovered. Mendeleev left vacant spaces in his periodic table for noble gases. Which of the above statements is/are correct? (a) Only 1 (b) Only 2 (c) Both 1 and 2 (d) Neither 1 nor 2 Your score isThe average score is 0% 0% Restart quiz Uncategorized
