Question

Both ${\mathrm{CO}}_2$ and ${\mathrm{H}}_2$ gases are:

• A. Heavier than air
• B. Acidic in nature
• C. Colorless
• D. Soluble in water

Answer 1

The correct option is C

Colorless

The explanation for the correct option

(C) Colorless

${\mathrm{CO}}_2$ and ${\mathrm{H}}_2$ are both colorless gases.

The explanation for the incorrect options

(A) Heavier than air

${\mathrm{CO}}_2$ is heavier than air but ${\mathrm{H}}_2$ is lighter than air.

(B) Acidic in nature

${\mathrm{CO}}_2$ is acidic but ${\mathrm{H}}_2$ is neutral in nature.

(D) Soluble in water

${\mathrm{CO}}_2$ is soluble in water but ${\mathrm{H}}_2$ is insoluble in water.

Therefore, both ${\mathrm{CO}}_2$ and ${\mathrm{H}}_2$ gases are colorless and option (C) is correct.