Number of compounds from the following with zero dipole moment is

Question

Canvas Classes · Accepted Answer

Zero dipole moment requires symmetric charge distribution.

Step 1 — Analyse each compound:

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

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