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 among the following gases is also known as ‘Laughing Gas’?

Option 1: Sulphur dioxide

Option 2: Nitrogen oxide

Option 3: Carbon dioxide

Option 4: Carbon monoxide

Question : Which acid makes the atmosphere of Venus have thick white and yellowish clouds?

Option 1: Sulphuric acid

Option 2: Nitric acid

Option 3: Acetic acid

Option 4: Hydrochloric acid

Question : Ozone consists of which of the following?

Option 1: Oxygen only

Option 2: Oxygen and Nitrogen

Option 3: Hydrogen and Carbon

Option 4: Oxygen and Carbon

Question : Which of the following chemicals are widely used in gunpowder of fireworks?

Option 1: Silver nitrate and charcoal

Option 2: Silver nitrate and sulphur

Option 3: Potassium sulphate and phosphorous

Option 4: Potassium nitrate, sulphur and charcoal