set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Brass gets fade colour in air due to the presence of

a) Nitrogen

b) Carbon dioxide

c) Oxygen

d) Hydrogen sulphide

Question : 2

Which one of the following elements forms the maximum number of compounds?

a) Oxygen

b) Hydrogen

c) Carbon

d) Nitrogen

Question : 3

Which one of the following elements is not present in the German Silver?

a) Nickel

b) Zinc

c) Copper

d) Aluminium

Question : 4

How much carbon does steel contain?

a) Zero

b) 10-50%

c) 0.1-2%

d) 7-10%

Question : 5

Which one of the following is also called Stranger Gas?

a) Neon

b) Xenon

c) Argon

d) Nitrous Oxide

Question : 6

The substance used as moderator and coolant both, in nuclear reactors is

a) Liquid Hydrogen

b) Liquid Ammonia

c) Ordinary water

d) Heavy water