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 $
