Question

Greenish-yellow gas having an irritating, choking, and unpleasant odour is:
A) Chlorine
B) Ammonia
C) Nitrogen
D) None of the above

Answer 1

Hint: The gas is greenish yellow colored gas which can be compared to the gases given in the option. One can even use their laboratory experiment experiences to relate the properties given of the gas in the question.

Complete step by step answer:
1) First of all let's analyze each gas given in the option one by one. The chlorine gas is very poisonous and classified as an irritant. It is greenish-yellow in color and shows an unpleasant odour. The gas has the capability of causing damage to the upper and lower respiratory tract which causes the choking. Hence, this option is correct.
2) The ammonia gas is a colorless gas that has a distinct odour for itself. This shows that the properties of ammonia don’t match with the properties given in the question. Hence, this option is incorrect.
3) The nitrogen gas is colorless, odourless, and tasteless gas which shows that the properties of the nitrogen gas don’t match with the properties of gas given in the question. Hence, this option is incorrect.
4) Therefore, after analyzing all the options, the chlorine gas is greenish-yellow gas having an irritating, choking, and unpleasant odour which shows the option A as a correct choice.
Thus the correct answer is option A.


Note:
The chlorine gas has many industrial uses. Chlorine gas was once used as a chemical weapon during world war I. Because of the chlorine gas's strong unpleasant odour the gas is easily detected. Some symptoms of exposure to chlorine gas involve the burning in the throat and bronchial area due to its irritant property.