Redox Reactions And Electrochemistry Ques 266
Question: The atomic weight of $ Al $ is 27. When a current of 5 Faradays is passed through a solution of $ A{l^{+++}} $ ions, the weight of $ Al $ deposited is [NCERT 1984]
Options:
A) 27 gm
B) 36 gm
C) 45 gm
D) 39 gm
Show Answer
Answer:
Correct Answer: C
Solution:
$ A{l^{3+}}+3{e^{-}}\to Al $ $ E_{Al}=\frac{27}{3}=9 $ $ W_{Al}=E_{Al}\times No\text{.},\text{of }faradays $ $ =9\times 5=45gm $ .
