Question

The set of asymmetric top molecules is

• A. CH\(_3\)CN, CH\(_3\)OH, H\(_2\)CO
• B. H\(_2\)O, H\(_2\)CO, CH\(_3\)CN
• C. H\(_2\)O, CH\(_3\)CN, CH\(_3\)OH
• D. CH\(_3\)OH, H\(_2\)O, H\(_2\)CO

Hint:

Asymmetric top molecules have no symmetry in their moments of inertia, making their rotational spectra more complex than prolate or oblate molecules.

Answer 1

The Correct Option is D

Step 1: Understanding asymmetric top molecules.
Asymmetric top molecules are those in which the three moments of inertia are all different. These molecules lack a plane of symmetry and have no special symmetry in their rotational properties.
Step 2: Analyzing the options.
- (D) CH\(_3\)OH, H\(_2\)O, and H\(_2\)CO are examples of asymmetric top molecules because they all have different moments of inertia.
- The other options contain molecules that either have a plane of symmetry or do not satisfy the condition of having three different moments of inertia.
Step 3: Conclusion.
The correct set of asymmetric top molecules is option (D).
Final Answer: \[ \boxed{\text{CH}_3\text{OH}, \, \text{H}_2\text{O}, \, \text{H}_2\text{CO}} \]