The description which most approximately suits sulphur dioxide gas is that it is colourless and :
(1) insoluble in water
(2) has pungent and suffocating odour
(3) lighter than air
(4) has smell of rotten eggs

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Solution

Sulfur dioxide is a colorless gas. It has a pungent and suffocating odour. Inhaling it can cause inflammation in eyes, headache, and if inhaled for a long time it can cause death.

Hence, the correct answer is option 2.

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The description which most approximately suits sulphur dioxide gas is that it is colourless and : (1) insoluble in water (2) has pungent and suffocating odour (3) lighter than air (4) has smell of rotten eggs

Sulfur dioxide is a colorless gas. It has a pungent and suffocating odour. Inhaling it can cause inflammation in eyes, headache, and if inhaled for a long time it can cause death. Hence, the correct answer is option 2.

The description which most approximately suits sulphur dioxide gas is that it is colourless and :
(1) insoluble in water
(2) has pungent and suffocating odour
(3) lighter than air
(4) has smell of rotten eggs

Sulfur dioxide is a colorless gas. It has a pungent and suffocating odour. Inhaling it can cause inflammation in eyes, headache, and if inhaled for a long time it can cause death.

Hence, the correct answer is option 2.