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One mole of acidified K2Cr2O7 on reactio...

One mole of acidified `K_2Cr_2O_7` on reaction with excess KI will liberate …… mole (s) of `I_2`.

A

6

B

1

C

7

D

3

Text Solution

Verified by Experts

The correct Answer is:
D
`Cr_(2)O_(7)^(2-)+14H^(+)+6I^(-)rarr2Cr^(3+)+7H_(2)O+3I_(2)`
3 moles of `I_(2)` per mole of `K_(2)Cr_(2)O_(7)` are produced.
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