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ICSE Class 10 Chemistry Question 14 of 60

Electrolysis — Question 24

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Question 24

Assertion (A): Polar covalent compounds can form ions when dissolved in water.

Reason (R): Electrovalent compounds show dissociation.

  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

Both A and R are true but R is not the correct explanation of A.

Explanation — Polar covalent compounds are converted into ions in water , and these ions conduct electricity. Hence assertion (A) is true.
For example : water.

Electrovalent compounds when melted or dissolved in water, electrostatic force of attraction is broken and they dissociate into ions and conduct electricity.Hence the reason (R) is true.

Since reason (R) doesn't explain the ionisation of polar covalent compound it is not correct explaination of assertion (A).