Q52 / 200 · Manipal (MET) 2011 · Chemistry

The mole fraction of water in $20 \%$ aqueous solution of $\mathrm{H}_2 \mathrm{O}_2$ is

  • A
    $\frac{20}{80}$
  • B
    $\frac{80}{20}$
  • Correct answer
    C
    $\frac{34}{77}$
  • D
    $\frac{77}{68}$

Solution

Mole fraction of $\mathrm{H}_2 \mathrm{O}=\frac{80 / 18}{\frac{80}{18}+\frac{20}{34}}=\frac{34}{77}$

Hence, the correct answer is option: 'C'.

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