(i) Valence band overlaps with conduction band.

(ii) The gap between the valence band and the conduction band is negligible.

(iii) The gap between the valence band and the conduction band cannot be determined.

(iv) Valence band may remain partially filled.

Correct Answers:

(i) Valence band overlaps with conduction band.

(ii) The gap between the valence band and the conduction band is negligible.

(iv) Valence band may remain partially filled.

Explanation:

In metals, the gap between the valence band and the conduction band can be determined.