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A mixture of K(2)C(2)O(4) and KHC(2)O(4)...

A mixture of `K_(2)C_(2)O_(4)` and `KHC_(2)O_(4)` required equal volumes of `0.1 M K_(2)Cr_(2)O_(7)` for oxidation and 0.1 M NOH for neutralisation is separate titratiosn. The molar ratio of `K_(2)CrO_(4)` and `KHC_(2)O_(4)` in the mixture is

A

`1:1`

B

`2:1`

C

`1:2`

D

`3:1`

Text Solution

Verified by Experts

The correct Answer is:
B
Let no. of moles of `K_(2)C_(2)O_(4)=a&`
no. of moles of `KHC_(2)O_(4)=b`
Eqts of `K_(2)C_(2)O_(4)+` Eqts of `KHC_(2)O_(4)`
= Eqts of `K_(2)Cr_(2)O_(7)`
`(axx2)+(bxx2)=0.1xx6xxv....(1)`
Eqts of `KHC_(2)O_(4)` = Eqts of NaOH
`(bxx1)=0.1xx1xxv....(1)`
On solving (1), (2)
a : b = 2 : 1
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