The \(\left(\frac{\partial E}{\partial T}\right)_p\) 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?
| 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?
- A
- B
- C
- D
The Correct Option is C
Solution and Explanation
A reference electrode is preferred when it exhibits minimal variation in electromotive force (EMF) with temperature. This characteristic allows the electrode to be used across a broader range of temperatures without deviating significantly from the standard value. Therefore, electrodes with lower rates of change in EMF with respect to temperature (\(\frac{\partial E}{\partial T}\) at constant pressure) are preferred for their stability across diverse temperature conditions.
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Concepts Used:
Electrolysis
Electrolysis:
Electrolysis is the process by which an element is decomposed and undergoes some chemical change under the influence of any electric current. The first-ever electrolysis was executed out by Sir Humphrey Davey in the year 1808. Electrolysis can occur in both Galvanic cells and Electrolytic cells.
Applications of Electrolysis:
- Electrolytic cells are used for the production of Hydrogen and Oxygen gas from water.
- They are used for the large-scale production of pure metals like sodium, copper, magnesium, etc.
- They are used to extract Aluminium from Bauxite.
- Electrolytic cells are used for electroplating, a process by which a thin protective layer of one metal is formed over another metal, mostly for protection.
- Electrolysis is used for the electrorefining of non-ferrous metals.
Read More: Products of Electrolysis