Tear gas is:

Question  Tear gas is: (a) Hydrogen sulphide (b) Chlorine (c) Hydrogen chloride (d) Ammonia Solution Correct Answer is: (c) Hydrogen chloride

Quartz is composed of:

Question  Quartz is composed of: (a) Calcium sulphate (b) Calcium silicate (c) Sodium sulphate (d) Sodium silicate Solution Correct Answer is: (b) Calcium silicate

Dry ice is ________.

Question  Dry ice is ________. (a) Solid CO₂ (b) Solid H₂O (c) Solid H₂O₂ (d) Dehydrated ice Solution Correct Answer is: (a) Solid CO₂

The heavy water is a type of:

Question  The heavy water is a type of: (a) Coolent (b) Moderator (c) Ore (d) Fuel Solution Correct Answer is: (b) Moderator

The permanent hardness of water appears due to:

Question  The permanent hardness of water appears due to: (a) Carbonates of calcium and magnesium (b) Bicarbonates of calcium and magnesium (c) Chloride and sulphate of calcium and magnesium (d)