Redox Reactions And Electrochemistry Ques 17
Question: Which of the following reactions occurs at the cathode of a common dry cell [NCERT 1978]
Options:
A) $ Mn,\to ,M{n^{2+}}+2{e^{-}} $
B) $ 2MnO_2+Z{n^{2+}}+2{e^{-}},\to ZnMn_2O_4 $
C) $ 2ZnO_2+M{n^{2+}}+2{e^{-}},\to MnZn_2O_4 $
D) $ Zn,\to ,Z{n^{2+}}+2{e^{-}} $
Show Answer
Answer:
Correct Answer: B
Solution:
In common dry cell. Anode : $ Zn\to Z{n^{++}}+2{e^{-}} $ Cathode: $ 2MnO_2+Z{n^{++}}+2{e^{-}}\to ZnMn_2O_4 $ .
