objective questions set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Gas welding used for welding broken pieces of iron, we normally use a mixture of :

a) ethene and oxygen

b) ethyne and oxygen

c) ethane and oxygen

d) ethene and air

Question : 2

Match Column-I with Column-II :

a) A-S; B-Q; C-P; D-R

b) A-Q; B-S; C-R; D-P

c) A-Q; B-S; C-P; D-R

d) A-S; B-Q; C-R; D-P

Question : 3

The order of appearance of the following with increasing temperature during the refining of crude oil is _____________ .

a) Gasoline, kerosene, diesel

b) Kerosene, gasoline, diesel

c) Diesel, gasoline, kerosene

d) Gasoline, diesel, kerosene

Question : 4

Which of the following has shortest carbon-carbon bond length?

a) C₂H₄

b) C₂H₆

c) C₂H₂

d) C₆H₆

Question : 5

Which of the following has maximum density?

a) Water

b) Benzene

c) Chloroform

d) Ice