The following are some statements about normal hydrogen electrode
A) when a ‘Zn’ electrode is in combination of NHE, Zn electrode acts as cathode
B) when a ‘Cu’ electrode is in combination with NHE, Cu electrode is the anode
C) when a ‘Ag’ electrode is in combination with NHE, Ag electrode is the anode
D) when a chlorine electrode is in combination with NHE, chlorine electrode is the anode

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only 1 is correct

all are correct

all are incorrect

both 2 & 3 correct

answer is C.

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Detailed Solution

When Zn & NHE ; Zn acts as anode ( so statement ‘a’ is incorrect )

When Cu & NHE ; Cu acts as cathode ( so statement ‘b’ is incorrect)

When Ag & NHE ; Ag acts as cathode ( so statement ‘ c’ incorrect )

When Cl₂ & NHE ; Cl₂ acts as cathode ( so statement ‘d’ is incorrect )

all statements are incorrect .

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