organic chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 11 [CDS]

Addition of ethylene dibromide to petrol

a) helps elimination of lead oxide

b) removes the sulphur compound in petrol

c) increases the octane number of fuel

d) serves as a substitute of tetraethyl lead

Question : 12

Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?

a) Oxygen, calcium, phosphorus

b) Hydrogen, oxygen, sodium

c) Carbon, hydrogen, nitrogen

d) Carbon, hydrogen, potassium

Question : 13 [NDA]

The main constituent of Vinegar is:

a) Ascorbic acid

b) Citric acid

c) Acetic acid

d) Tartaric acid

Question : 14

Mineral acids are stronger acids than carboxylic acids because

1. mineral acids are completely ionized
2. carboxylic acids are completely ionized
3. mineral acids are partially ionized
4. carboxylic acids are partially ionized

a) B and C

b) A and B

c) A and D

d) C and D

Question : 15 [CDS]

The flavour of apple is mainly due to which one of the following?

a) Benzene

b) Ethanol

c) Formalin

d) Benzaldehyde