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Q.

A current of 2 amp when passed for 5 hours through a molten salt deposits 22.2 g of metal of atomic mass 177. The oxidation state of the metal in the metal salt is:

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answer is 3.

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Detailed Solution

$\begin{aligned} W = \frac{itE}{96500} \\ 59.5 = \frac{177}{n} \end{aligned}$
n = 3

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A current of 2 amp when passed for 5 hours through a molten salt deposits 22.2 g of metal of atomic mass 177. The oxidation state of the metal in the metal salt is: