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The correct Answer is:
A, B, C, D
(a) `MnO_4^(-) to Mn^(+2) : 7 to 2 :. "charge" = 5e^(-) = 5 xx 96500 c = 482500c `
(b) ` Cr_2O_7^(-2) to Cr^(+3) , 6 to +3 :. " Charge " = 6e^(-) = 6 xx 96500 c = 579000 c `
(c)` Sn^(+4) to Sn^(+2) :. "charge " = 2e^(-) = 2 xx 96500 c = 193000 c `
(d) ` Al^(+3) to Al , 3 to 0 :. "charge " = 3e^(-) = 3 xx 96500 c = 289500 c`
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