Redox Reactions And Electrochemistry Ques 581

Question: A current of 2.0 A passed for 5 hours through a molten metal salt deposits 22.2 g of metal (At wt. = 177). The oxidation state of the metal in the metal salt is

Options:

A) +1

B) +2

C) +3

D) +4

Show Answer

Answer:

Correct Answer: C

Solution:

[c] $ m=\frac{E.wt\times Q}{96500}; $
$ \therefore E.,wt=\frac{m\times 96500}{Q}=\frac{22.2\times 96500}{2\times 5\times 60\times 60}=60.3 $ Oxidation state $ =\frac{At,Wt.}{Eq.,wt}=\frac{177}{60.3}=3 $



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