Question

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

• A. heavier than air
• B. colorless
• C. acidic in nature
• D. soluble in water

Answer 1

The correct option is B

colorless

Explanation for correct option:

B. Colorless

Properties of Carbon dioxide $\left({\mathrm{CO}}_2\right)$:

• Carbon dioxide is a chemical compound that is made up of one carbon and two oxygen atoms in which a carbon atom has a double bond with each oxygen atom.
• It is a colorless as well as odorless gas.
• It is somewhat toxic too.
• It is denser than air.

Properties of Hydrogen $\left({\mathrm{H}}_2\right)$:

• Hydrogen behaves as a gas at standard conditions.
• It is a diatomic gas that is made up of two hydrogen atoms.
• It is a colorless as well odorless gas.
• It is a non-toxic as well as a highly flammable gas.

Explanation for incorrect options:

The property that is similar for both Carbon dioxide and hydrogen gas is that they both are colorless gases. Thus, options A, C, and D are incorrect.

Hence, the correct option is B i.e. Colorless.