Question

Which of the following is not used as a reference electrode​

Answer 1

Answer:

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Copper electrode cannot form the inner reference electrode in glass electrodes

Answer 2

Which of the following is not used as a secondary reference electrode.

a) Calomel electrode

b) Silver /silver chloride electrode

c) Mercury /Mercury sulphate electrode

d) Glass electrode.

Glass electrode can not be used as a secondary reference electrode.

Option (d)

• Glass electrode is an indicator electrode. It responds to the changes of activity of analyte ion.
• Calomel electrode is the most important general purpose electrode. Mercury chloride is known as Calomel electrode.
• Silver chlorides electrodes have good chemical and electrical stability. These electrodes can be used in temperatures greater than 600°c.

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