In a mole of water vapours at STP, the volume actually occupied or taken by the molecules (i.e., Avogadro's No.`xx` volume of one molecule) is

Options

A. zero
B. less than 1% of 22.4 litres
C. about 10% of the volume of container
D. 1% to 2% of 22.4 litres

Answer

B

Explanation

We suppose that at `4^(@)C` (When water has maximum density) there is no empty space between the molecules of water = 18 mL
Volume of 1 mol water vapours at S.T.P = 22400 mL
Percentage of volume occupied
`= (18)/(22400)xx100 = 0.08%`
Thus volume actually occupied is less than 1 %