Question

Assertion (A): Hydrogen chloride gas is collected by upward displacement of air.

Reason (R): Hydrogen chloride gas is not soluble in water.

Options

• If both A and R are true, and R is the correct explanation of A.

• If both A and R are true, but R is not the correct explanation of A.

• If A is true, but R is false.

• If both A and R are false.

Answer 1

If A is true, but R is false.

Explanation:

Hydrogen chloride (HCl) gas is 1.28 times heavier than air, so it settles at the bottom of the jar and pushes the lighter air upward. However, the reason is completely false because HCl gas is extremely soluble in water, meaning it cannot be collected over water.