Question

The `((del E)/(del T))_P`of different types of half cells are as follows:

A	B	C	D
1 × 10−4	2 × 10−4	0.1 × 10−4	0.2 × 10−4

(where E is the electromotive force)

Which of the above half cells would be preferred to be used as reference electrode?

Options

• A

• B

• C

• D

Answer 1

C

Explanation:

A reference electrode with minimal EMF variation with temperature is preferable, as it can be utilised throughout a large temperature range without significantly deviating from conventional values.