The total number of molecules with zero dipole moment among and is

Question

The total number of molecules with zero dipole moment among  and  is

Canvas Classes · Accepted Answer

Zero dipole moment requires symmetric molecular geometry.

Step 1 — Analyse each molecule:

| Molecule | Shape | Dipole moment |
|----------|-------|---------------|
|  | Tetrahedral, symmetric | Zero ✓ |
|  | Trigonal planar, symmetric | Zero ✓ |
|  | Bent | Non-zero ✗ |
| HF | Diatomic, polar | Non-zero ✗ |
|  | Pyramidal | Non-zero ✗ |
|  | Linear, symmetric | Zero ✓ |
|  | Bent | Non-zero ✗ |

Step 2:  → 3 molecules with zero dipole moment

Note: JEE answer for this question is 2 (considerin

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