Chemistry
Give reasons for the following:
A direct current instead of alternating current should be used in electrolysis.
Electrolysis
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Answer
Direct current flows in one direction, allowing the electrodes to maintain fixed polarity. One electrode is always the anode (+) (where oxidation occurs), and the other is always the cathode (–) (where reduction occurs).
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Related Questions
Give reasons for the following:
In the electrolysis of acidified water, dilute sulphuric acid is preferred to dilute nitric acid for acidification.
Give reasons for the following:
Ammonia is unionized in the gaseous state but in the aqueous solution, it is a weak electrolyte.
During the electrolysis of molten lead bromide, which of the following takes place ?
- Bromine is released at the cathode
- Lead is deposited at the anode
- Bromine ions gain electrons
- Lead is deposited at the cathode
Select the correct answer:
The aqueous solution of the compound which contains both ions and molecules is
A. H2SO4
B. HCl
C. HNO3
D. CH3COOH