set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons?

a) Propane, butane, ethane and methane

b) Butane, ethane, propane and methane

c) Methane, ethane, propane and butane

d) Butane, propane, ethane and methane

Question : 2

The functional group present in CH₃COOC₂H₅ is

a) ester

b) aldehydic

c) ketonic

d) carboxylic

Question : 3

Hydrogenation of oils involves

1. saturation of unsaturated fatty acids
2. reaction with hydrogen in presence of nickel
3. conversion into saturated fatty acids
4. driving off the impurities in oil by hydrogen gas

a) 2, 3 and 4

b) 1, 2 and 3

c) 1, 2 and 4

d) 1, 3 and 4

Question : 4

Isomers of a substance must have the same

a) chemical properties

b) physical properties

c) structural formula

d) molecular formula

Question : 5

‘Drinking alcohol’ is very harmful and it ruins the health. ‘Drinking alcohol’ stands for:

a) drinking ethyl alcohol

b) drinking propyl alcohol

c) drinking methyl alcohol

d) drinking isopropyl alcohol

Question : 6

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that

a) the fuel is wet.

b) the fuel is not burning completely.

c) the food is not cooked completely.

d) the fuel is burning completely.