141. The most electropositive metal is
(A) Barium (B) Rubidium
(C) Sodium (D) Cesium
Ans. (D)
142. Which is not a cyclic compound?
(A) Anthracene (B) Pyrrole
(C) Isobutylene (D) Phenol
Ans. (C)
143. Optical isomerism is shown by
(A) Butanol-1 (B) Butanol-2
(C) Butene-1 (D) Butene-2
Ans. (B)
144. Beilstein’s test is used for the detection of
(A) Phosphorus (B) Halogens
(C) Sulphur (D) Nitrogen
Ans. (B)
145. The Carbon-Carbon bond length is shortest in
(A) Ethane (B) Propane
(C) Ethene (D) Ethyne
Ans. (D)
146. In a simple cubic lattice, the ratio between distance between nearest neighbour and radius of an atom is
(A) 1 : 2 (B) 1 : 4
(C) 2 : 1 (D) 4 : 1
Ans. (C)
147. Which of the following is a colligative property?
(A) Boiling Point (B) Osmotic Pressure
(C) Vapour Pressure (D) Freezing Point
Ans. (B)
148. During rusting of iron, it gets
(A) Oxidised (B) Reduced
(C) Sublimed (D) Decomposed
Ans. (C)
149. The half life period of reaction is 100 min. In 400 min. the initial concentration of 2.0 g will become
(A) 0.25 g (B) 0.75 g
(C) 0.125 g (D) 0.1 g
Ans. (C)
150. Purple of cassius is colloidal sol of
(A) Platinum (B) Copper
(C) Gold (D) Silver
Ans. (C)
151. Copper is refined by
(A) Smelting (B) Roasting
(C) Electrolytic method (D) Heating in a blast furnace
Ans. (C)
152. Bleaching action of SO2 is due to
(A) Reduction (B) Oxidation
(C) Hydrolysis (D) None of these
Ans. (A)
153. Calomel is
(A) Hg2Cl2 (B) PbCl2
(C) HgS (D) HgCl2
Ans. (A)
154. The number of ligands which are directly bonded to the metal ion is known as
(A) Oxidation state
(B) Co-ordination sphere
(C) Co-ordination number
(D) Valency
Ans. (C)
155. Gammexane is the name given to
(A) C6H3Cl3 (B) C6H4Cl2
(C) C6H6Cl6 (D) None of these
Ans. (C)
156. Which of the following is most acidic?
(A) Picric acid (B) Phenol
(C) Ethyl alcohol (D) P-P-Nitrophenol
Ans. (A)
157. Which of the following is hypnotic?
(A) Acetaldehyde (B) Paraldehyde
(C) Metaldehyde (D) Formaldehyde
Ans. (B)
158. Aniline is purified by
(A) Fractional distillation (B) Simple distillation
(C) Steam distillation (D) None of these
Ans. (C)
159. Hydrolysis of sugar is called
(A) Mutarotation (B) Saponification
(C) Inversion (D) Deesterification
Ans. (C)
160. Plexiglass is a commercial name of
(A) Glyptal (B) Polymethyl methacrylate
(C) Polyacrylonitrile (D) Polyethylacrylate
Ans. (B)
