The spin only magnetic moment of Fe2+ ion (in BM) is approximately 5

153.    The spin only magnetic moment of Fe2+ ion (in BM) is approximately

(A) 7

(B) 4

(C) 6

(D) 5

Answer:: (D)

154.    Benzaldehyde and acetone can be best distinguished using ______.

(A) sodium hydroxide solution

(B) Fehling's solution

(C) Tollens' reagent

(D) 2, 4-DNPH

Answer:: (C)

156.    Benzene reacts with chlorine in sunlight to give a final product

(A) C6H5Cl

(B) C6Cl6

(C) C6H6Cl6

(D) CCl4

Answer:: (C)

157.    By what factors does the average velocity of a gaseous molecule increase when the temperature (in Kelvin) is doubled?

(A) 1.4

(B) 2.0

(C) 2.8

(D) 4.0

Answer:: (A)

158.    Carbon can reduce ferric oxide to iron at a temperature above 983 K because ______.

(A) carbon has a higher affinity towards oxidation than iron.

(B) carbon monoxide formed is thermodynamically less stable than ferric oxide.

(C) iron has a higher affinity towards oxygen than carbon.

(D) free energy change for the formation of carbon dioxide is less negative than that for ferric oxide.

Answer:: (A)

159.    Carbon forms two oxides which have different compositions. The equivalent mass of which remains constant?

(A) carbon

(B) oxygen

(C) neither carbon nor oxygen

(D) both carbon and oxygen

Answer:: (B)

160.    Catalytic dehydrogenation of a primary alcohol gives a

(A) secondary alcohol

(B) aldehyde

(C) ketone

(D) ester

Answer:: (B)