Question

Molar volume of a gas is the volume occupied by -

• A. 22.4 g of the gas
• B. one gram of the gas
• C. one mole of the gas
• D. $6.023\times {10}^{23}$g of the gas

Answer 1

The correct option is C

one mole of the gas

Explanation of the correct option :

(C) Standard temperature and pressure conditions S.T.P. for a gas as set by IUPAC ( International Union of pure and applied Chemistry) are:

(Temperature =273.15 K, Pressure = 1 atm)

According to mole concept, At S.T.P , one mole of any gas = 22.4 L which is also called molar volume of the gas.

Also Molar volume of a gas = molecular mass of the gas.

Explanation of the incorrect option :

(A) one mole of any gas at S.T.P = 22.4 L and not 22.4 g.

(B) Molar volume of a gas = molecular mass of the gas and not one gram.

(D) One mole of any gas = $6.023\times {10}^{23}$ molecules of a gas and not $6.023\times {10}^{23}$ g.