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Dichromate ion in acidic medium oxidizes...

Dichromate ion in acidic medium oxidizes stannous ion as `xSn^(2+)+yCr_2O_7^(2-)+zH^+rarraSn^(4+)+bCr^(3+)+cH_2O`

A

the value of x:y is 1 :3

B

the value of `x+y+z` is18

C

a : b is 3 :2

D

the value of z - c is 7

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