(i) All three N—O bond lengths in HNO3 are equal.

(ii) All P—Cl bond lengths in PCl5 molecule in the gaseous state are equal.

(iii) P4 molecule in white phosphorus have angular strain therefore white phosphorus is very reactive.

(iv) PCl is ionic in the solid-state in which cation is tetrahedral and the anion is octahedral.

Correct Answers: 

(iii) P4 molecule in white phosphorus have angular strain therefore white phosphorus is very reactive.

(iv) PCl is ionic in the solid-state in which cation is tetrahedral and the anion is octahedral.

Explanation: All three N—O bond lengths in HNO3 are not equal and all P—Cl bond lengths in PCl5 molecule in the gaseous state are also not equal.