Question : Which among the following is added to commercial nitric acid to make it coloured?

Option 1: Carbon dioxide

Option 2: Sulphur dioxide

Option 3: Coloured impurities

Option 4: Nitrogen dioxide

Question : Which of the following gases is used in a bulb?

Option 1: Hydrogen

Option 2: Carbon dioxide

Option 3: Carbon monoxide

Option 4: Argon

Question : Carbon monoxide is an inflammable gas. Which one of the following is also inflammable?

Option 1: Helium

Option 2: Nitrogen

Option 3: Oxygen

Option 4: Hydrogen

Question : Cooking gas is a mixture of:

Option 1: methane and ethylene

Option 2: carbon dioxide and oxygen 

Option 3: butane and propane

Option 4: carbon monoxide and carbon dioxide 

Question : Which among the following is a greenhouse gas?

I. Methane

II. Carbon dioxide 

III. Nitrogen dioxide

Option 1: I and II

Option 2: I and III

Option 3: II and III

Option 4: All the above