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6xx10^(-3) mole K(2)Cr(2) C(7) reacts co...

`6xx10^(-3)` mole `K_(2)Cr_(2) C_(7)` reacts completely with `9xx10^(-3)` mole `X^(n+)` to give `XO_(3)^(-)` and `Cr^(3+)`. The value of `n` is `:`

A

1

B

2

C

3

D

5

Text Solution

Verified by Experts

The correct Answer is:
A
gram equivalent of `K_(2)Cr_(2)O_(7)=` gram equivalent of `X^(n+)`
`(6xx10^(-3))xx6=(5-n)xx9xx10^(-3)`
`5-n=4`
`n=1`
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