The mole fraction of water in $20 \%$ aqueous solution (By weight) of $\mathrm{H}_{2} \mathrm{O}_{2}$ is

The mole fraction of water in $20 \%$ aqueous solution (By weight) of $\mathrm{H}_{2} \mathrm{O}_{2}$ is
  1. $\frac{77}{68}$
  2. $\frac{68}{77}$
  3. $\frac{20}{80}$
  4. $\frac{80}{20}$

Solution

Mole fraction of $\mathrm{H}_{2} \mathrm{O}=$ $\frac{\frac{80}{18}}{\frac{80}{18}+\frac{20}{34}}=\frac{68}{77}$

Asked in: JEE-TOPICTESTS-CHEMISTRY

Practice more SOLUTIONS questions on Aicharya