Identify the correct orders against the property mentioned. A. H2O NH3 CHCl3 - dipole moment. B. XeF4 XeO3 XeF2 - number of lone…

Question

Identify the correct orders against the property mentioned.

A. H2O NH3 CHCl3 - dipole moment. B. XeF4 XeO3 XeF2 - number of lone pairs on central atom. C. O-H C-H N-O - bond length. D. N2 O2 H2 - bond enthalpy.

Choose the correct answer from the options given below:

1. A. A, D only (Correct answer)
2. B. B, D only
3. C. A, C only
4. D. B, C only

Correct Answer

Option A — A, D only

Detailed Solution & Explanation

The correct answer is A, D only.

Key Points

• A (true): dipole moments H$_2$O (1.85 D) > NH$_3$ (1.47 D) > CHCl$_3$ (1.04 D).
• D (true): bond enthalpy follows bond order — N$_2$ (b.o. 3) > O$_2$ (b.o. 2) > H$_2$ (b.o. 1).
• B (false): lone pairs are XeF$_2$ (3) > XeF$_4$ (2) > XeO$_3$ (1), not the order given.
• C (false): correct bond-length order is N-O > C-H > O-H (O-H is the shortest).