Question

Given below are two statements: Assertion (A): All metals are good conductors of electricity. Reason (R): Metals contain free electrons that allow electric current to pass. Choose the most appropriate answer.

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A).
• B. Both (A) and (R) are correct but (R) is not the correct explanation of (A).
• C. (A) is correct but (R) is not correct.
• D. (A) is not correct but (R) is correct.

Hint:

Metals conduct electricity because they have mobile free electrons.

Answer 1

The Correct Option is A

Metals are generally good conductors of electricity. This is because of their atomic structure. In metals, some electrons are not tightly bound to individual atoms. These electrons are free to move throughout the metallic structure. Such electrons are called free electrons. When a potential difference is applied across a metal, these free electrons move in an organized direction. This movement of electrons produces electric current. Therefore, Assertion (A) is correct. Reason (R) is also correct because metals conduct electricity due to the presence of free electrons. Also, Reason (R) properly explains Assertion (A). Hence, the correct answer is: \[ \text{Both (A) and (R) are correct and (R) is the correct explanation of (A).} \]