Indian Science and Technology Quiz Questions and Answers - 2

Question: 6

Nitrogen fixation is done by

(A) Blue green algae

(B) Brown algae

(C) Green algae

(D) Red algae

Question: 7

An air bubble in water will act like a

(A) Convex lens

(B) Concave lens

(C) Convex mirror

(D) Concave mirror

Question: 8

The main constituent of biogas are

(A) Butane and carbon dioxide

(B) Methane and carbon monoxide

(C) Methane and carbon dioxide

(D) Ethylene and carbon dioxide

Question: 9

Jet engines are

(A) Reaction engines

(B) Rotary engines

(C) External combustion engines

(D) Turbine engines

Question: 10

Which of the following is a mixed fertiliser?

(A) Ammonium sulphate

(B) CAM

(C) NPK

(D) Urea