Question

35. A gas is collected by the upward displacement of air but cannot be collected either downward or upward 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 the air and is highly soluble in water.
• C. It is heavier and is highly soluble in water.
• D. It is lighter than air and water.

Answer 1

The correct option is C

It is heavier and 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 water 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.

• The probable characteristics of Carbon dioxide gas are that it is heavier and is highly soluble in water.

Hence, option (C) is the correct answer.