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6 xx 10^(-3) "mole" K(2)Cr(2)O(7) reacts...

`6 xx 10^(-3) "mole" K_(2)Cr_(2)O_(7)` reacts competely with `9 xx 10^(-3) "to give " XO_(3)^(-) and Cr^(3+)`. The value of n is:

A

1

B

2

C

3

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
1
`K_(2)Cr_(2)O_(7)+X^(n+)rarr X^(5+)O_(3)^(-)+Cr^(3+)`
`6xx10^(-3)xx6=(5-n)xx9xx10^(-3)`
`rArr " "n=1`
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