Question

14. A gas is collected by the upward displacement of air but cannot be collected by downward displacement of water. Identify the probable characteristics of the gas.

• A. It is heavier than air and insoluble in water.
• B. Its vapor density is equal to air and it is highly soluble in water.
• C. It is heavier than air and it is highly soluble in water
• D. It is lighter than air and water.

Answer 1

The correct option is C

It is heavier than air and it is highly soluble in water

Explanation for the correct option:

Option (C):

• Carbon dioxide $\left({\mathrm{CO}}_2\right)$ gas is collected by the upward displacement of air.
• Carbon dioxide gas is heavier than air and is highly soluble in water. The solubility of Carbon dioxide increases with an increase in pressure.

Explanation for the incorrect options:

Option (A): Carbon dioxide gas is heavier than air but highly soluble in water.

Option (B): The vapor density of Carbon dioxide gas is higher than that of air.

Option (D): Carbon dioxide gas is heavier than air and water.

Hence, option (C) is the correct answer. The probable characteristics of Carbon dioxide gas are that it is heavier than air and is highly soluble in water.