set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

One mole of Hydrogen gas burns in excess of Oxygen to give 290 kJ of heat. What is the amount of heat produced when 4g of Hydrogen gas is burnt under the same conditions?

a) 1160 kg

b) 580 kg

c) 145 kg

d) 290 kg

Question : 2

Brass gets fade colour in air due to the presence of

a) Nitrogen

b) Carbon dioxide

c) Oxygen

d) Hydrogen sulphide

Question : 3

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

a) Oxygen

b) Hydrogen

c) Carbon

d) Nitrogen

Question : 4

Which one of the following is also called Stranger Gas?

a) Neon

b) Xenon

c) Argon

d) Nitrous Oxide

Question : 5

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

a) Liquid Hydrogen

b) Liquid Ammonia

c) Ordinary water

d) Heavy water

Question : 6

Steel is further processed to obtain stainless steel by adding some element. Which one of the following is not used for this purpose?

a) Nickel

b) Manganese

c) Carbon

d) Silicon