set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

General formula of alkyne is

a) C_nH_2n–2

b) C_nH_2n

c) C_nH_2n+2

d) C_nH_n

Question : 2

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 : 3

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 : 4

The functional group present in CH₃COOC₂H₅ is

a) ester

b) aldehydic

c) ketonic

d) carboxylic

Question : 5

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 : 6

On the basis of following features identify the correct option A. Drinks containing ethanol B. These drinks are major source of income to government

a) Soft drinks

b) Carbonated beverages

c) Alcoholic beverages

d) Rectified spirit