Redox Reactions And Electrochemistry Ques 264

Question: Three faradays electricity was passed through an aqueous solution of iron (II) bromide. The weight of iron metal (at. wt. = 56) deposited at the cathode (in gm) is [EAMCET 1991]

Options:

A) 56

B) 84

C) 112

D) 168

Show Answer

Answer:

Correct Answer: B

Solution:

$ F{e^{2+}}+2{e^{-}}\to Fe;E_{Fe}=\frac{56}{2}=28 $ $ W_{Fe}=E_{Fe} $ × Number of faraday $ =28\times 3=84gm $ .



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