Question : Nitrification is the biological process of converting.

Option 1: Nitrogen into nitrate

Option 2: Nitrogen into nitrite

Option 3: Ammonia into Nitrite

Option 4: Ammonia into NItrogen

Question : Nitrogen is an essential constituent of all:

Option 1: Fats

Option 2: Proteins

Option 3: Vitamins

Option 4: Carbohydrates

Question : The pair of compounds used as anaesthetic in medicines :

Option 1: Ether, Ammonia

Option 2: Nitrous oxide, Chloroform

Option 3: Chloroform, Nitrogen dioxide

Option 4: Nitrogen dioxide, Ether

Question : The chemical name of 'laughing gas' is

Option 1: Nitric Oxide

Option 2: Nitrogen Dioxide

Option 3: Nitrogen Pentaoxide

Option 4: Nitrous Oxide

Question : The commonly used coolant in refrigerators is

Option 1: Ammonia

Option 2: Nitrogen

Option 3: Freon

Option 4: Oxygen