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ICSE Class 10 Chemistry Question 15 of 60

Electrolysis — Question 25

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25
Question

Question 25

Assertion (A): A block of pure silver metal is used as anode during silver plating.

Reason (R): Silver ions are deposited as metal at the anode.

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not the correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.
Answer

A is true but R is false.

Explanation — The block of pure silver is used as anode because it is active electrode, as it slowly dissolves in the solution, Ag⁺ ions are produced for the plating process. Hence the assertion (A) is true.

Silver ions are deposited on to the article that acts as cathode. Hence reason (R) is false.