Question

A conductivity cell containing electrodes made up of
(a) Gold
(b) Silver
(c) Platinised platinum
(d) Copper

Answer 1

Answer:

correct anser is copper

Answer 2

Answer:

(c) platinized platinum is the correct answer.

Explanation:

Platinized platinum electrodes are used in conductivity cells as:

• platinum is an inert metal that is required in some reactions where the inert electrode does not participate in any reactions.
• It is used as an electrode because it is a very good conductor of electricity.
• due to a large surface area, platinum electrodes act as a catalyst by adsorbing H2 gas (SHE concentration cell).

Hence, (c) platinized platinum electrodes are used in a conductivity cell.