Question

Consider the following pairs: (A) NO\(_2\) \(>\) O\(_3\) \(>\) H\(_2\)O (Bond angle)
(B) HF \(>\) H\(_2\)O \(>\) NH\(_3\) (Dipole moment)
(C) I\(_2\) \(>\) F\(_2\) \(>\) N\(_2\) (Bond length) Which of the above pairs are correctly matched?

• A. A, B \& C
• B. B \& C only
• C. A \& C only
• D. A \& B only

Hint:

Bond angles are influenced by lone pairs and hybridization, while bond lengths depend on atomic size and bond order.

Answer 1

The Correct Option is C

(A) NO\(_2\) \(>\) O\(_3\) \(>\) H\(_2\)O (Bond angle): Correct, because NO\(_2\) has the least lone-pair repulsions, leading to a larger bond angle. (B) HF \(>\) H\(_2\)O \(>\) NH\(_3\) (Dipole moment): Incorrect, because H\(_2\)O has a higher dipole moment than HF due to its bent structure. (C) I\(_2\) \(>\) F\(_2\) \(>\) N\(_2\) (Bond length): Correct, because bond length increases with atomic size.