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Question

During electrolysis, the reaction that takes place at the cathode is _____


A

Oxidation

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B

Reduction

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C

Decomposition

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D

Redox

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Solution

The correct option is B

Reduction


Explanation:

Electrolysis:

  • Electrolysis is defined as a process of decomposing ionic compounds into their elements by passing a direct electric current through the compound in a fluid form.

Reduction:

  • Reduction is the gain of electrons or a decrease in the oxidation state of a chemical or atoms within it.
  • In the process of electrolysis, there is an exchange of ions and atoms due to the addition or removal of electrons from the external circuit.
  • On passing current, cations move to the cathode, take electrons from the cathode (given by the supply source battery), and discharged into the neutral atom.
  • The neutral atom, if solid, is deposited on the cathode, and if gas moves upwards.
  • This is a reduction process and the cation is reduced at the cathode.

Therefore, option (A) is the correct answer.


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