Question

Which among the given options is not a physical property of HCl gas?

• A. Pale yellow colour
• B. Denser than air
• C. Acidic nature
• D. Pungent smell

Answer 1

The correct option is A

Pale yellow colour

Hydrochloric acid has the following physical properties:

1) It has a pungent and choking smell. So, it is inadvisable to smell HCl gas. If HCl gas is inhaled, it can result in immediate choking, coughing, chest tightness and pain, sore throat, etc.

2) It is colourless.

3) It is denser than air.

4) It is acidic in nature.

So the wrong property among the given options is that HCl is Pale yellow in colour.