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Organic Chemistry

Posted on August 23, 2025August 23, 2025 By admin

Organic Chemistry Organic ChemistryOrganic ChemistryOrganic ChemistryOrganic ChemistryOrganic ChemistryOrganic ChemistryOrganic ChemistryOrganic ChemistryOrganic Chemistry

Organic Chemistry

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1. Carbon is called a unique element because—

2 / 234

2. Who proposed the Vital Force Theory?

3 / 234

3. The first organic compound synthesized in the laboratory was—

4 / 234

4. Who first synthesized urea in the laboratory?

5 / 234

5. Which of the following properties are found in organic compounds?

6 / 234

6. Which of the following properties are found in organic compounds?

7 / 234

7. Which of the following elements is found in all organic compounds?

8 / 234

8.The most abundant organic compound found in nature is—

9 / 234

In organic compounds, the four valencies of the carbon atom are directed towards the four corners of a tetrahedron with carbon at the center — this idea was first given by?

10 / 234

10. Among all known atoms, carbon is a unique atom because—

11 / 234

11. Consider the following statements:

  1. In organic chemistry, the study of carbon compounds is done.
  2. Organic chemistry is actually the chemistry of hydrocarbons and their derivatives.

Which of the above statements is/are correct?

12 / 234

12. What type of chemical bond is present in organic compounds?

13 / 234

13. The total number of carbon compounds is extremely high compared to other elements, because—

14 / 234

14. Which of the following is not an organic compound?

15 / 234

15. Which of the following is an organic compound?

16 / 234

16. The organic compounds in which all the carbon atoms in the molecule form an open chain are called—

17 / 234

17. Benzene and phenol are which type of organic compounds?

18 / 234

18. Which of the following is aliphatic?

19 / 234

19. Which of the following is a heterocyclic organic compound?

20 / 234

20. The group of atoms present in organic compounds that imparts chemical properties to the compound is called—

21 / 234

21. Consider the following statements:

  1. The chemical properties of an organic compound depend on the functional group present in it.
  2. All organic compounds having the same functional group undergo similar chemical reactions.

Which of the above statements is/are correct?

22 / 234

24. The reactive group present in carboxylic acids is—

23 / 234

25. Which statement is correct regarding a homologous series?

24 / 234

26. Consider the following statements—

  1. All compounds of a homologous series contain the same functional group.
  2. All compounds of a homologous series show similarity in chemical properties.
  3. Compounds of a homologous series show similarity in physical properties.

Which of the above statements are correct?

25 / 234

27. Which of the following are homologous?

26 / 234

29. The IUPAC system of nomenclature for organic compounds was implemented in—

27 / 234

30. The general formula of saturated hydrocarbons is—

28 / 234

31. Which of the following statements is NOT correct regarding saturated hydrocarbons?

29 / 234

32. The general formula of an alkyl group (R) is—

30 / 234

35. What is the chemical formula of propyl?

31 / 234

34. What is the chemical formula of propane?

32 / 234

36. The IUPAC name of CH₃OH is—

33 / 234

39. The IUPAC name of Chloral is—

34 / 234

40. The IUPAC name of chloroform is—

35 / 234

41. In the excited state of a carbon atom, the number of unpaired electrons is—

36 / 234

42. Which of the following pairs are homologous?

37 / 234

43. Organic compounds that have the same molecular formula but different structural formulas are called—

38 / 234

44. Isomeric compounds show differences in—

39 / 234

46. Consider the following statements—

  1. Most organic compounds exhibit isomerism.
  2. The phenomenon of isomerism is not found in inorganic compounds.

Which of the above is/are NOT correct?

40 / 234

45. Isomeric compounds show similarity in—

41 / 234

47. Which of the following shows isomerism?

42 / 234

48. Normal butane and isobutane are—

43 / 234

49. Pentane, isopentane, and neopentane are which type of isomers?

44 / 234

50. 1-Propanol and 2-Propanol are—

45 / 234

51. 1-butene and 2-butene are—

46 / 234

52. Ethyl alcohol (C₂H₅OH) and Dimethyl ether (CH₃–O–CH₃) are—

47 / 234

53. Acetone (CH₃–CO–CH₃) and Propionaldehyde (CH₃–CH₂–CHO) are—

48 / 234

Consider the following statements:

  1. Geometrical isomerism is found in those organic compounds in which there is a double bond between two carbon atoms.
  2. Geometrical isomerism is exhibited by alkenes and their derivatives.

Which of the above is/are correct?

49 / 234

55.Maleic acid and Fumaric acid exhibit which type of isomerism?

50 / 234

"Which of the following represents an asymmetric carbon atom?"

51 / 234

Which of the following are isomers?

52 / 234

"Which of the following represents an asymmetric carbon atom?"

53 / 234

59.How many chain isomers are possible for the molecular formula C₄H₁₀?

54 / 234

60. Which is considered the “parent” of all aliphatic compounds?

55 / 234

61. The shape of a methane (CH₄) molecule is—

56 / 234

62. The bond angle between carbon and hydrogen in a methane (CH₄) molecule is—

57 / 234

63. In a methane (CH₄) molecule, the carbon atom is—

58 / 234

64. Which gas is produced when water reacts with aluminium carbide (Al₄C₃)?

59 / 234

65. What is the main component of fuels like biogas, natural gas, and gobar gas?

60 / 234

66. Which gas is called Marsh gas?

61 / 234

67. How is methane gas prepared in the laboratory?

62 / 234

68. Which gas is mainly present in the mixture of gases released from a septic tank?

63 / 234

69. Which of the following statements about methane (CH₄) is NOT correct?

64 / 234

70. Consider the following statements:

  1. Methane burns in air with a non-luminous flame.
  2. The color of the methane flame is blue.

Which of the above statements is/are correct?

65 / 234

71. What is the cause of explosions in mines?

66 / 234

72. The gas produced due to the decomposition of vegetation in marshy areas is: 

67 / 234

73. The area that produces methane gas is:

68 / 234

74. The gas mainly used for cooking is:

69 / 234

75. Carbon black, used in making printing ink or black ink, is prepared from:

70 / 234

76. Consider the following statements:

  1. Methane reacts with halogens only in bright sunlight.
  2. In the dark, there is no reaction between methane and halogens.

Which of the above statements is/are correct?

71 / 234

77. What is the carbon–hydrogen bond length in a methane molecule?

72 / 234

78. Which of the following gases is used in cigarette lighters?

73 / 234

79. Which gas is produced when sodium propionate is heated with soda lime?

74 / 234

80. The chemical form of artificial camphor is:

75 / 234

81. The shape of an ethylene (C₂H₄) molecule is:

76 / 234

82. What is the bond angle between carbon and hydrogen in an ethylene molecule?

77 / 234

83. Which of the following statements about ethylene is NOT correct?

78 / 234

84. How is ethylene (C₂H₄) gas prepared in the laboratory?

79 / 234

85. Ethylene (C₂H₄) reacts with sulfur monochloride (S₂Cl₂) to produce which poisonous gas?

80 / 234

87. In which of the following ways is ethylene NOT used?

81 / 234

88. Ethyne is an example of:

82 / 234

86. Which of the following was used as a chemical weapon in World War I?

83 / 234

89. Consider the following statements:

  1. Acetylene is an odorless gas.
  2. Due to the presence of phosphine impurity, acetylene has a garlic-like odor.

Which of the above statements is/are correct?

84 / 234

90. How is acetylene gas prepared in the laboratory?

85 / 234

91. Which of the following fuels is used in gas welding?

86 / 234

92. Lewisite gas, used in war, is prepared from:

87 / 234

93. What is the chemical name of Westron?

88 / 234

94. The IUPAC name of Westron is:

89 / 234

95. Which gas is used to ripen fruits artificially?

90 / 234

96. Which gas is used in lamps to produce light?

91 / 234

97. Which organic compound, known as Narsilene, is used as an anesthetic in surgery?

92 / 234

99. Which of the following is used for joining (welding) and cutting metals?

93 / 234

98. When acetylene is passed through a heated copper or iron tube, which compound is obtained?

94 / 234

100. Consider the following statements:

  1. Methane burns with a non-luminous flame.
  2. Ethylene burns with a luminous flame.
  3. Acetylene burns with a sooty (carbon-rich) flame.

Which of the above statements is/are correct?

95 / 234

101. Where are chlorofluorocarbons (CFCs) mostly used?

96 / 234

102. By what other name is the chlorofluorocarbon used in refrigerators (domestic coolers) known?

97 / 234

103. Freon is:

98 / 234

104. Which of the following statements about chloroform is NOT correct?

99 / 234

106. By what other name is carbon tetrachloride (CCl₄) known?

100 / 234

107. Which is used to extinguish fire caused by electricity?

101 / 234

108. In which way is carbon tetrachloride used?

102 / 234

109. Which of the following solvents is used in dry cleaning of clothes?

103 / 234

110. Which of the following is NOT an anesthetic agent?

104 / 234

111. The general formula of alcohol is—

105 / 234

112. Alcohol contains which of the following elements?

106 / 234

113. The chemical formula of ethanol (ethyl alcohol) is—

107 / 234

114. The beverage substances like beer, wine, whisky, and cough syrup contain—

108 / 234

115. By which method is ethyl alcohol prepared in industries?

109 / 234

116. The slow conversion of complex organic substances into simpler substances in the presence of enzymes is called—

110 / 234

117. Which of the following is a fermentation reaction?

111 / 234

119. Glucose and fructose are converted into ethanol by which enzyme?

112 / 234

118. What type of reaction is fermentation?

113 / 234

120. The inventor and zymase enzymes used in alcohol (ethanol) production come from—

114 / 234

121. In the presence of concentrated sulfuric acid, the reaction of ethene (C₂H₄) with water produces—

115 / 234

122. Which gas is released during fermentation?

116 / 234

123. Consider the following statements regarding the properties of ethanol (ethyl alcohol):

  1. It is a colorless liquid.
  2. It is insoluble in water.
  3. It is highly flammable.
  4. It burns with a blue flame to give carbon dioxide and water.

Which of the above statements are correct?

117 / 234

124. Which alcohol is used in alcoholic beverages?

118 / 234

125. Which alcohol is known as “Grain Alcohol”?

119 / 234

126. Excessive consumption of ethyl alcohol adversely affects which human organ?

120 / 234

127. When toxic substances like methanol, pyridine, or copper sulfate are added to ethyl alcohol, it is called—

121 / 234

128. Why is it necessary to denature alcohol?

122 / 234

129. Denatured spirit is mainly used for which purpose?

123 / 234

130. Rectified spirit is—

124 / 234

131. Absolute alcohol is—

125 / 234

132. After shaving, the solution applied to the face gives a cooling sensation. This property is due to the presence of which compound?

126 / 234

133. What is the final product of alcoholic fermentation?

127 / 234

134. Tincture of iodine is—

128 / 234

135. Which of the following is also called wood spirit or wood alcohol?

129 / 234

137. Antifreeze is a mixture of—

130 / 234

136. Which alcohol, if consumed even in very small amounts, can cause severe poisoning and blindness?

131 / 234

139. In cold countries, automobile radiators use an antifreeze mixture. What does this mixture contain?

132 / 234

138. When ethylene reacts with cold, alkaline potassium permanganate solution, it produces—

133 / 234

140. The IUPAC name of formaldehyde is—

134 / 234

141. A 35–40% aqueous solution of formaldehyde is called—

135 / 234

142. Methanol, in the presence of catalysts like silver or iron oxide and molybdenum oxide at 873–923 K, gets oxidized to produce—

136 / 234

143. 'Urotropine', used in urinary disorders, is prepared from—

137 / 234

144. The chemical name of urotropine is—

138 / 234

145. Which of the following substances is commercially produced from cumene?

139 / 234

146. Which of the following is used as a nail polish remover?

140 / 234

147. Consider the following statements:

  1. Ethanoic acid is commonly known as acetic acid.
  2. A 5–8% solution of acetic acid in water is called vinegar.

Which of the above statements is correct?

141 / 234

149. Which of the following is NOT correct?

142 / 234

150. Pyroligneous acid contains—

143 / 234

151. Pyroligneous acid obtained from wood contains—

144 / 234

152. The sodium or potassium salts of higher carboxylic acids like stearic acid, palmitic acid, and oleic acid are called— 

145 / 234

153. The sodium or potassium salts of high fatty acids such as oleic (CH₃(CH₂)₇CH=CH(CH₂)₇COOH), stearic (CH₃(CH₂)₁₆COOH), and palmitic (CH₃(CH₂)₁₄COOH) acids are called—

146 / 234

154. The sodium salts of hydrogen sulfate derivatives of higher alcohols are called—

147 / 234

155. The sodium salts of long-chain benzene sulfonic acids are called—

148 / 234

156. Which of the following statements about soap is NOT correct?

149 / 234

157. Consider the following statements:

  1. Soap is suitable for cleaning in soft water.
  2. Detergent is suitable for cleaning in both soft and hard water.

    Which of the above statements is correct? 

150 / 234

158. When soap or detergent molecules dissolve in water, their molecules aggregate to form clusters, which are called—

151 / 234

160. Which of the following characteristics should be present in good quality soap?

152 / 234

159. Oleic, stearic, and palmitic acids are— 

153 / 234

161. Soap is not suitable for cleaning in hard water because—

154 / 234

162. Which compound is called the parent of aromatic compounds?

155 / 234

163. What is the chemical name of Gamaxene?

156 / 234

164. Gamaxene is—

157 / 234

165. Carbolic acid is—

158 / 234

166. The common name of Carbolic acid is—

159 / 234

167. Which substance is found in the sting of an ant or a bee?

160 / 234

168. Which acid is present in vinegar?

161 / 234

169. Which acid is found in tomato?

162 / 234

170. What causes the sourness of curd (yogurt)?

163 / 234

171. In which does citric acid occur in free form?

164 / 234

172. Which acid is found in grapes?

165 / 234

173. Which acid is found in tamarind?

166 / 234

174. Which acid is used to remove stains from clothes?

167 / 234

175. Which acid is used in photography?

168 / 234

176. In photography, oxalic acid is used in which form?

169 / 234

177. Kidney stones in humans are mostly made of—

170 / 234

178. Doctors advise that people suffering from kidney and gall bladder stones should avoid eating large amounts of tomato, eggs, milk, and cabbage, so that crystals of the following do not form—

171 / 234

179. In plant cells, oxalic acid occurs in which form?

172 / 234

180. Which of the following pairs is NOT correctly matched?

173 / 234

181. The compound related to the Bhopal Gas Tragedy was—

174 / 234

182. Which compound is used in tear gas?

175 / 234

183. Which preservative is used to keep tomato ketchup, fruit juice, and other food items safe for a longer time?

176 / 234

184. Which acid is used in the manufacture of medicines?

177 / 234

185. Which is used in food processing?

178 / 234

186. The full name of D.D.T. (DDT) is—

179 / 234

188. What is the reason for the sweet taste of fruits?

180 / 234

187. By accident, touching the leaves of the scorpion plant (netol) causes a burning sensation. This is due to the secretion of which substance?

181 / 234

189. Who discovered benzene?

182 / 234

190. In what form is iodoform used?

183 / 234

191. Which of the following explosives is called "Nobel oil"?

184 / 234

192. Which of the following is not an explosive?

185 / 234

193. Who discovered the explosive RDX?

186 / 234

194. Which of the following explosives is called a plastic explosive?

187 / 234

195. Consider the following statements:

  1. Dynamite is prepared using nitroglycerin.
  2. Nowadays, sodium nitrate is used instead of nitroglycerin to make dynamite.

Which of the above statements is/are correct?

 

188 / 234

196. The molecular formula of R.D.X. is:

189 / 234

197. R.D.X. explosive is also known by which name?

190 / 234

198. The heat released by R.D.X. explosive is:

191 / 234

199. What is wax?

192 / 234

200. Paraffin wax is obtained from:

193 / 234

201. Which of the following statements about polymerization is NOT correct?

194 / 234

202. An example of polymerization is:

195 / 234

203. Which of the following statements about "polymer" is NOT correct?

196 / 234

204. Which of the following is not a natural polymer?

197 / 234

205. Natural rubber is a polymer of which hydrocarbon?

198 / 234

206. Which of the following synthetic polymers is similar to natural rubber?

199 / 234

207. Neoprene rubber is obtained by the polymerization of which of the following?

200 / 234

208. The first industrial synthetic rubber is:

201 / 234

209. Which of the following polymers contains ester linkages?

202 / 234

210. The fiber obtained by the condensation of adipic acid and hexamethylene diamine is:

203 / 234

211. Phenol is used in the manufacture of which of the following?

204 / 234

212. Which of the following is an addition polymer?

205 / 234

213. PMMA is a polymer of—

206 / 234

214. Which of the following is used to make non-stick cooking utensils?

207 / 234

215. Caprolactam is the monomer of which of the following?

208 / 234

216. Terylene is formed by the reaction of terephthalic acid with which of the following?

209 / 234

217. Orlon is a polymer made from which of the following?

210 / 234

218. What is Teflon?

211 / 234

219. Polymerization of chloroethene gives—

212 / 234

220. Which of the following is not a natural polymer?

213 / 234

221. Which of the following is not a polymer?

214 / 234

237. Consider the following statements—

  1. Nylon is a polyamide fiber.
  2. Terylene is a polyester fiber.

Which of the above statements is/are correct?

215 / 234

222. Which of the following polymers is used to make bulletproof windows?

216 / 234

223. Which of the following polymers is used in making non-stick frying pans?

217 / 234

224. Bakelite is a polymer of phenol and which of the following?

218 / 234

225. Raincoats are made from which of the following?

219 / 234

226. PVC is formed by the polymerization of which of the following?

220 / 234

228. The first human-made artificial fiber was—

221 / 234

227. Teflon plastic is made by the polymerization of which compound?

222 / 234

229. Nylon is—

223 / 234

230. Artificial silk is also known by which name?

224 / 234

231. Which of the following is a natural fiber?

225 / 234

232. Lac is—

226 / 234

233. The polymer obtained by the condensation of hexamethylene diamine and adipic acid is—

227 / 234

234. Which monomer is used in the synthesis of Nylon-6?

228 / 234

235. Which of the following is an example of a non-cellulosic fiber?

229 / 234

236. Which of the following polymers cannot be biodegraded?

230 / 234

237. Consider the following statements—

  1. Nylon is a polyamide fiber.
  2. Terylene is a polyester fiber.

Which of the above statements is/are correct?

 

231 / 234

238. Plastics are—

232 / 234

239. Which plastic is used for packaging food materials?

233 / 234

240. Polythene and PVC are—

234 / 234

241. Bakelite is—

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