100 mL of `NaHC_(2)O_(4)` required 50 mL of 0.1M `KMnO_(4)` solution in acidic medium. Volume of 0.1M NaOH required by 100 mL of `NaHC_(2)O_(4)` is :

Answer

C

Explanation

Let M be the molarity of `NaHC_(2)O_(4) underset(n=1)(to)` as an acid
`underset(n=2)(to)`as a reducing agent.
With `KMnO_(4) : 100xxMxx2=50xx0.1xx5 implies M=1/8`
With NaOH :`1/8 xx 1 xx100 = 0.1xx1xxV_(ml) implies V_(ml)=125ml`