set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

‘Humus’ is an example of

a) Organic colloids

b) Soil structure

c) Crystalloids

d) None of the above

Question : 2

The fuel used in a diesel engine

a) Mixture of diesel and petrol

b) Vapour of diesel and air

c) Diesel only

d) Mixture of diesel, air and petrol

Question : 3

Match List-I with List-II and select the correct answer using the codes given below the lists:

a) 3 2 4 1

b) 2 1 3 4

c) 2 4 3 1

d) 3 2 1 4

Question : 4

The percentage of nitrogen in urea is

a) 47%

b) 30%

c) 25%

d) 60%

Question : 5

Which one of the following is used in the manufacture of soaps?

a) Mobil oil

b) Kerosene oil

c) Vegetable oil

d) Cutting oil

Question : 6

Tetraethyl Lead (TEL) is added to petrol

a) To increase its anti-knocking rating

b) To prevent it from freezing

c) To increase its flash points

d) To increase its boiling point