JEE MAIN - Chemistry (2022 - 26th June Morning Shift - No. 4)
The $${\left( {{{\partial E} \over {\partial T}}} \right)_P}$$ of different types of half cells are as follows:
| A | B | C | D |
|---|---|---|---|
| $$1 \times {10^{ - 4}}$$ | $$2 \times {10^{ - 4}}$$ | $$0.1 \times {10^{ - 4}}$$ | $$0.2 \times {10^{ - 4}}$$ |
(Where E is the electromotive force)
Which of the above half cells would be preferred to be used as reference electrode?
A
B
C
D
Explanation
A cell with less variation in EMF with temperature
is preferred as a reference electrode because it can be
used for a wider range of temperatures without much
derivation from standard value so a cell with less $${\left( {{{\partial E} \over {\partial T}}} \right)_P}$$ is preferred.
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