Redox Reactions And Electrochemistry Ques 284

Question: A current 2.0 A is passed for 5 hours through a molten metal salt deposits 22 g of metal (At. wt. =177). The oxidation state of the metal in the metal salt is [KCET 1996]

Options:

A) + 1

B) + 2

C) + 3

D) + 4

Show Answer

Answer:

Correct Answer: C

Solution:

$ {E_{metal}}=\frac{Weightof,metal\times 96500}{Number,of,coulombs} $ $ =\frac{22.2\times 96500}{2\times 5\times 60\times 60}=59.5 $ Oxidation number of the metal $ =\frac{177}{59.5}=+,3 $



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