Multiple choice

Among the following electrodes which one is a type of redox electrode?

  1. Palladium-hydrogen electrode

  2. Plate electrode

  3. Quinhydrone electrode

  4. Potassium selective electrodes
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C Correct answer
Explanation

The quinhydrone electrode is a type of redox electrode which can be used to measure the hydrogen ion concentration (pH) of a solution in a chemical experiment. It provides an alternative to the commonly used glass electrode in a pH meter. The electrode consists of an inert metal electrode (usually a platinum wire) in contact with quinhydrone crystals and a water-based solution.

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