Question

A mixture of `Na_(2)C_(2)O_(4)` and `KHC_(2)O_(4).H_(2)C_(2)O_(4)` required equal volumes of 0.2 M `KMnO_(4)` and 0.2 M NaOH separately for complete titration the mole ratio of `Na_(2)C_(2)O_(4)` and `KHC_(2)O_(4).H_(2)C_(2)O_(4)` in the mixture is
A. `(2)/(11)`
B. `(11)/(2)`
C. `(5)/(2)`
D. `(7)/(2)`

Answer 1

Correct Answer - B
`underset(x mmol)(Na_(2)C_(2)C_(4)),underset(y mmol)(KHC_(2)O_(4).H_(2)C_(2)O_(4)`
(i). `x xx0+yxx3=0.2xxV`
(ii). `x xx2+yxx4=(0.2xx5)xxVimplies(x)/(y)=(11)/(2)`