Question

Assertion (A): In metals, the flow of electricity is due to flow of electrons whereas in electrolytic solution, the flow is due to ions.

Reason (R): Electrical conduction by metals and by electrolytic solution increases with increases of temperature.

Options

• If both A and R are true, and R is the correct explanation of A.

• If both A and R are true, but R is not the correct explanation of A.

• If A is true, but R is false.

• If both A and R are false.

Answer 1

If A is true, but R is false.

Explanation:

The assertion is true because metallic conduction relies entirely on the movement of free delocalized electrons, whereas electrolytic conduction depends on the movement of mobile ions. The reason is false because temperature affects these two systems in opposite ways: as temperature increases, metallic conduction decreases because increased thermal vibrations (kernels) obstruct electron flow, while electrolytic conduction increases because viscosity decreases and ionic mobility rises.