Question : Which of the following gases is used in the manufacture of soft drinks?

Option 1: Oxygen

Option 2: Carbon dioxide

Option 3: Carbon monoxide

Option 4: Radon

Question : Which of the following statements is true?

Option 1: Lead is the most common pollutant of automobile exhaust.

Option 2: The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin compared to oxygen.

Option 3: Photochemical smog always contains ozone.

Option 4: All options are correct.

Question : Silver articles become black after their exposure to air because they react with _____________in the air.

Option 1: nitrogen

Option 2: hydrogen

Option 3: sulphur

Option 4: carbon dioxide

Question : Dry ice is the solid form of_____.

Option 1: carbon dioxide

Option 2: nitrogen

Option 3: oxygen

Option 4: hydrogen

Question : Which of the following is not a gaseous air pollutant?

Option 1: Oxides of Nitrogen

Option 2: Hydrogen

Option 3: Smoke

Option 4: Oxides of Sulphur