TRB Polytechnic Model Question Paper for Chemistry - 4

Question: 16

The percentage purity of ethanol in absolute alcohol is

(A) 4.4%

(B) 15%

(C) 95.6%

(D) 100%

Question: 17

Which one of the following is associated with the formation of brown air in traffic congested cities

(A) Carbon monoxide

(B) Nitrogen oxide

(C) Carbon dioxide

(D) Sulphur dioxide

Question: 18

pH of 0.1 M NAOH would be

(A) 1

(B) 2

(C) 6

(D) 13

Question: 19

The conversion of ethanol into ethyl acetate is called as

(A) Decarboxylation

(B) Esterification

(C) Dehydration

(D) Dehydrogenation

Question: 20

The molecular formula for oleum is

(A) H₂S₂O₇

(B) H₂S

(C) H₂SO₄

(D) H₂SO₃