Question

List I List II

A) Salt bridge 1) Reduction

B) Standard hydrogen electrode 2) Oxidation

C) Cathode 3) Reference electrode

D) Anode 4) KCl,KNO${}_3,$

(or) NH${}_4$NO${}_3.$.

The correct match is :

• A. 3 4 2 1
• B. 4 3 1 2
• C. 4 3 2 1
• D. 1 2 3 4

Answer 1

The correct option is B 4 3 1 2

At salt-bridge compounds like $KCl,KN{O}_3$ or $N{H}_{4}N{O}_3$ are used to complete the circuit.

standard hydrogen electrode is used as reference electrode with $SRP=0$ and potential of all electrodes all measured relative to it.

At cathode reduction takes place.

At anode oxidation takes place.

Hence option B is correct