Non-Metal and their Compound Non-Metal and their Compound

Which of the following are called non-metals?

2 Non-metals do not have a metallic luster because—

Q. Regarding non-metals, which one of the following is not correct?

4. Non-metals are generally not hard, but diamond, though a non-metal, is very hard. The reason is—

5. Why do non-metals not conduct electricity?

6. With which of the following substances do non-metals not react chemically?

7. Non-metals generally behave like—

Consider the following statements:

1. Non-metals combine with oxygen to form acidic oxides.
2. Non-metals never form basic (alkaline) oxides.

Which of the above statements is/are correct?

Which of the following is a non-metal?

Which of the following is not correct?

11.Which of the following has the highest melting and boiling point?

12.Which of the following is neither acidic nor basic?

13: Which of the following gases dissolves in water to form an acidic solution?

14: Which of the following is an electronegative element?

16: Consider the following statements:

1. Hydrogen was discovered by Henry Cavendish.
2. Hydrogen was named by Henry Bessemer.
3. Hydrogen is a diatomic molecule.

Which of the above statements is/are correct?

17: Hydrogen shows similarity with which of the following?

18: In the laboratory, when granular zinc reacts with dilute sulfuric acid, which gas is produced?

19: When zinc reacts with concentrated sulfuric acid instead of dilute sulfuric acid, which gas is produced?

20: Pure zinc is not used in the laboratory for producing hydrogen gas. Why?

21: Consider the following statements:

1. The lightest element is hydrogen.
2. The lightest gas is hydrogen.

Which of the above statements is/are correct?

Regarding hydrogen, which of the following is not correct?

23: When hydrogen is burned in air—

24: The nature of hydrogen oxide (H₂O) is—

25: When superheated steam reacts with hot iron filings, which is obtained?

26: When superheated steam is passed over red-hot coke, which gas is obtained?

27: When sodium formate is heated, which gas is produced?

28: Which gas is used in the hydrogenation of oils?

29: As a result of the hydrogenation of oils—

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?

30: Which of the following can absorb large volumes of hydrogen?

32: Consider the following statements and select the correct ones using the given code:

1. Some metals like platinum and palladium can occlude (absorb) large amounts of hydrogen.
2. In these metals, occluded hydrogen comes out only when heated.
3. Occluded hydrogen is less reactive compared to ordinary hydrogen.

33: Which is called the fuel of the future?

34: Why is hydrogen called the fuel of the future?

35: Hydrogen is the fuel of the future, but at present, what is the biggest difficulty in using it as a fuel?

36: Water is an excellent solvent because its molecules—

37: Which of the following is not correct?

38: Consider the following statements:

1. Water is amphoteric; it behaves like both an acid and a base.
2. Water behaves like both an oxidizing and a reducing agent.

Which of the above statements is/are correct?

39: Water that does not easily form lather with soap is called—

40: Temporary hardness of water is caused by the presence of—

41: How can temporary hardness of water be removed?

42: How is permanent hardness of water removed?

43: By which of the following methods can both temporary and permanent hardness of water be removed?

44: How many isotopes does hydrogen have?

45: Which isotope of hydrogen is called heavy hydrogen?

46: Which of the following is not correct?

47: The rare and radioactive isotope of hydrogen is—

48: Radioactive tritium is—

49: What is the half-life of tritium?

50: Deuterium can be obtained by—

51: Who first discovered deuterium (heavy hydrogen)?

52: Which of the following metals does not liberate hydrogen when reacting with dilute HCl?

53: Which of the following is used as a moderator in nuclear reactors?

54: With which of the following does dilute HNO₃ react to produce hydrogen gas?

55: Heavy water can be obtained by—

56: Which of the following oxides reacts with dilute H₂SO₄ to produce hydrogen peroxide (H₂O₂)?

57: How is hydrogen peroxide (H₂O₂) prepared in the laboratory?

58: Commercial “10-volume H₂O₂” is a solution whose strength is—

59: Consider the following statements regarding heavy water:

1. Deuterium oxide (D₂O) is called heavy water.
2. Like ordinary water, heavy water is also a colorless liquid.
3. Like ordinary water, heavy water also has maximum density at 4°C.

60. बालों के ब्लीचिंग में प्रयुक्त होता है-
(a) Heavy water
(b) Hydrogen peroxide
(c) Sulfuric acid
(d) Oxalic acid

61: Which chemical is used to clean decayed materials or restore colors in old oil paintings?

62: Why is sea water more saline than rainwater?

63: How can pure water be obtained from sea water?

64: When water is heated from 0°C to 100°C, its density—

65: When water is heated from 0°C to 100°C, its volume—

66: Why does water have a higher boiling point compared to hydrogen sulfide (H₂S) or hydrogen chloride (HCl)?

68: Water is called heavy water when it contains—

69: In rural areas, water is disinfected by—

70: The specific density of D₂O (heavy water) is—

72: Consider the following statements:

1. In the presence of potash alum, suspended impurities in water settle down.
2. Adding chlorine or bleaching powder to water destroys harmful microorganisms.

Which of the above statements is/are correct?

71: If a burning candle is placed in a jar of dry hydrogen gas, then—

73: Potassium permanganate makes water—

74: Which two reactants among the following will produce hydrogen gas?

76: When hard water is completely evaporated, a white solid residue remains in the container. This is due to the presence of—

1. Carbonates of Ca and Mg
2. Sulfates of Ca and Mg
3. Chlorides of Ca and Mg

Choose the correct answer using the code given:

77. The purest form of water is—

78. The reason why hydrogen is not found in the atmosphere is—

79. In the conversion of vegetable oil into Dalda or Vanaspati ghee, which of the following process is used?

81. Who discovered heavy water (D₂O)?

80. Which method is used in the industrial production of Vanaspati ghee?

82. Which group of the periodic table is called the Carbon family?

84. Which of the following is the radioactive isotope of carbon?

83. Which of the following about carbon is NOT correct?

85. Consider the statements—

1. The property of atoms of an element to bond with each other is called catenation.
2. Catenation occurs only in carbon.

Which are correct?

86. Which of the following elements forms the maximum number of compounds with hydrogen?

87. The property due to which the same element is found in several forms is called—

89. Consider the statements—

1. The chemical properties of different allotropes of the same element are different.
2. The physical properties of different allotropes of the same element show some similarity.

Which are correct?

88. Which of the following are allotropes of carbon?

90. Which of the following is NOT a crystalline allotrope of carbon?

92. Which of the following statements about diamond are correct?

1. It is used as a gemstone in jewelry due to its ability to reflect light.
2. It is a good conductor of electricity.
3. It is used to cut glass, marble, and other hard materials.
4. It is used for boring (drilling) through rocks.

Choose the correct answer using the codes below:

91. Which of the following does not contain carbon?

93. Which of the following is an element?

94. The purest form of carbon is—

95. Which of the following about diamond is NOT correct?

96. Which of the following about the properties of graphite is NOT correct?

97. The positive rod of a dry cell is made of—

98. Which of the following is a good lubricant?

99. Consider the statements—

1. When diamond is heated at high temperature, CO is released and diamond is destroyed.
2. When graphite is also heated at high temperature, CO is produced.

Which of the above are NOT correct?

100. To decolorize raw sugar, which of the following is used?

101. The use of diamond as a gemstone depends on which of its properties?

102. Corundum is chemically—

103. When diamond is heated up to 2000°C in the absence of air, the product obtained is—

104. What is the crystalline structure of graphite?

105. Consider the statements—

1. Passing steam over red-hot coke (carbon) produces water gas (CO + H₂).
2. Passing CO₂ gas over red-hot carbon produces CO.

Which are correct?

106. Which of the following statements about carbon monoxide (CO) is NOT correct?

107. Which gas burns with a blue flame?

108. Carbon monoxide (CO) poisoning primarily affects—

109. Consider the statements—

1. Passing steam over red-hot coke produces producer gas.
2. Passing air over red-hot coke produces water gas.

Which are correct?

110. Which of the following air pollutants combines with hemoglobin more rapidly than oxygen?

111. Which of the following is NOT correct?

112. What is the approximate concentration of carbon dioxide in the atmosphere?

113. Carbon dioxide gas reacts with water to form—

114. Which gas is used in fire extinguishers?

115. The presence of which causes lime water to turn milky when exposed to air?

116. Which gas is dissolved under high pressure in soda water, beer, and other soft drinks?

117. In the laboratory, when concentrated H₂SO₄ reacts with oxalic acid, which gas is produced?

119. In CO₂, the carbon is hybridized as—

118. The chemical formula of carbon suboxide is—

120. Which of the following gases dissolves in water to form an acidic solution?

121. Graphene is—

122. Which of the following statements about graphite is NOT correct?

123. The bubbles in champagne and soda are due to the presence of which gas?

124. If there were no carbon dioxide in the Earth's atmosphere, the temperature of the Earth's surface would—

125. Which of the following elements is used in solar cells?

126. Quartz is formed from—

127. In nature, crystalline silica or silicon dioxide (SiO₂) is found in which form?

128. Which of the following is NOT a crystalline form of silica?

129. A small bag filled with silica gel is often found in bottles of tablets or powdered medicines because silica gel—

130. Consider the statements—

1. Silica (SiO₂) occurs in nature as the mineral quartz.
2. The powdered form of quartz is called sand.

Which of the above is NOT correct?

131. What is the main component of air?

132. Nitrogen gas—

132. Who discovered nitrogen?

133. Which of the following statements about nitrogen gas is NOT correct?

134. If a burning splint is placed in a jar filled with nitrogen, it—

135. The gas used in electric bulbs is—

136. For artificial insemination, bull semen is stored in—

137. Which gas is used in high-temperature thermometers?

138. Which of the following is a cryogenic liquid?

139. Which reaction occurs due to lightning?

140. During lightning in the sky, especially in the rainy season or other days, which gas is produced?

141. On a commercial scale, nitrogen is obtained by—

142. Which of the following is an explosive compound of nitrogen?

143. In flash bulbs, the magnesium wire is kept in an atmosphere of—

144. Which of the following is a laughing gas that can cause death if inhaled excessively?

145. What is called laughing gas?

146. Which of the following nitrogen oxides is colored?

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?

147. A nitrogen molecule is chemically less reactive because there is what kind of bond between the two nitrogen atoms?

149. The name Haber is related to—

150. In the Haber process for ammonia synthesis, the suitable conditions are—

151. Ammonia is dried by—

152. Which catalyst is used for ammonia production by the Haber process?

153. Which refrigerant is commonly used in domestic refrigeration?

154. Why is ammonia used in refrigerators?

155. Which of the following is a property of ammonia?

156. Tear gas is—

158. Which of the following statements about the Haber process is NOT correct?

157. Which of the following is highly soluble in water?

159. The optimum temperature and pressure for ammonia production by the Haber process are—

160. Consider the following statements:

1. When ammonia reacts with excess chlorine, yellow nitrogen trichloride (NCl₃) is obtained.
2. Nitrogen trichloride is an explosive compound.

Which of the above is correct?

162. Which catalyst is used in ammonia production by the Haber process?

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—

165. Ammonia gas gives white fumes with which of the following substances?

166. Consider the following statements:

1. Aqueous solution of ammonia is acidic.
2. Aqueous solution of ammonium chloride is basic.

Which of the above statements is NOT correct?

167. What is the cause of lightning bolts in the atmosphere?

Q.169. The modern method of industrial preparation of Nitric Acid (HNO₃) is –

Q.170. The production of nitric acid by the Birkeland–Eyde process has now completely stopped, because –

Q.171. The chemical formula of Norwegian Saltpetre is –

Q.172. In the industrial preparation of nitric acid by the Birkeland–Eyde process, the starting raw material is –

Q.174. In the production of nitric acid by the Ostwald process, which catalyst is used?

Q.175. Which gas is dissolved in fuming nitric acid?

Q.177. Which of the following statements about Nitric Acid (HNO₃) is incorrect?

Q.176. For the preparation of nitrogen gas in the laboratory –

Q.180. The molecular formula of Phosphorus is –

Q.179. Which of the following properties is common to Hydrogen (H₂), Nitrogen (N₂), and Carbon Dioxide (CO₂)?

Q.181. Which of the following are tetraatomic molecules (P₄ type)?

Q.182. Industrial preparation of Phosphorus is done by heating which mixture in an electric furnace?

Q.183. An element forms a solid oxide which dissolves in water to give an acidic solution. Which of the following can it be?

Q.184. The most stable allotrope of Phosphorus is –

Q.185. Which allotrope of Phosphorus is the most reactive?

Q.186. Which statement about white and red phosphorus is incorrect?

187.Which of the following about white phosphorus is NOT correct?

188.Which allotrope of phosphorus is a conductor of electricity?

189. Yellow (white) phosphorus is kept preserved in which medium?

190.In the manufacture of matches, which substance is used?

191.Which allotrope of phosphorus shows the property of phosphorescence (glowing in dark)?

Q.192. White phosphorus reacts with hot and concentrated sodium hydroxide solution to form –

Phosgene is –

Phosphine is —

How is phosphine prepared in the laboratory?

Which of the following has a rotten fish-like smell?

Powdered bird bones are used as fertilizer because they are rich in –

198.Which of the following is used to create a smoke screen in war?

199. The molecular structure of phosphine (PH₃) is similar to which of the following?

200.The ordinary form of phosphorus is –

What is present on the tip of a matchstick?

1. Cerese and glass powder
2. White phosphorus
3. Antimony trisulfide (Sb₂S₃)
4. Potassium chlorate (KClO₃)

Choose the correct combination:

Which of the following is a strong dehydrating agent?

203. Which of the following is used to create smoke screens in riots and warfare?

204. Silicon doped with a small amount of phosphorus gives –

205.Which element is found in the largest amount on Earth?

206.What is the approximate percentage of oxygen in the atmosphere?

Who discovered oxygen?

From where does life-giving oxygen gas come?

Consider the following statements:

1. Oxygen is a combustible gas.
2. Oxygen supports combustion.

Which of the above is NOT correct?

211.When a glowing splint is introduced into oxygen gas, it –

210.Which of the following gases supports combustion?

212.Which mixture of gases do divers use for breathing?

213. The oxygen used for artificial respiration in hospitals is a mixture of –

Oxygen gas is –

Which of the following metals absorbs oxygen at high temperature?

Q.217.Which of the following is an acidic oxide?

218. Which of the following oxides is neutral?

Who is considered the discoverer of oxygen?

220.Which of the following compounds releases oxygen gas on strong heating?

221.Which of the following gases gives a reddish-brown solution when passed through alkaline pyrogallol?

222.Which element is present in the largest amount on the Earth's surface and in the human body?

223. Oxygen (O₂) and ozone (O₃) are –

224.Who first identified ozone gas?

225.What kind of smell does ozone gas have?

226.Consider the following statements:

• Oxygen is paramagnetic.
• Ozone is also paramagnetic like oxygen.

Which of the above is NOT correct?

227. Which of the following gases blackens silver?

228. At what concentration of ozone in the atmosphere does breathing cause headache and nausea?

229.Ozone gas is used in which of the following ways?

230.The molecular formula of sulfur is –

231.Which is called the enemy of copper?