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Question
Assertion (A): Electrovalent compounds conduct electricity even in solid state.
Reason (R): Electrovalent compounds are composed of ions.
Options
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
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Solution
A is false but R is true.
Explanation:
Electrovalent compounds are excellent electrical conductors when they are molten or in an aqueous condition, but they do not conduct electricity when they are solid because they cannot dissociate into ions. Therefore, the assertion (A) is untrue. Ions that are locked together by a strong electrostatic force of attraction and are difficult to separate make up electrovalent compounds. Reason (R) is therefore true.
