Number of compounds/species from the following with non-zero dipole moment is

Question

Canvas Classes · Accepted Answer

Non-zero dipole moment requires asymmetric charge distribution.

Step 1 — Analyse each species:

| Species | Shape | Dipole moment |
|---------|-------|---------------|
|  | Linear, symmetric | Zero ✗ |
|  | Trigonal planar, symmetric | Zero ✗ |
|  | Pyramidal, asymmetric | Non-zero ✓ |
|  | Square planar, symmetric | Zero ✗ |
|  | Tetrahedral, symmetric | Zero ✗ |
|  | Bent, asymmetric | Non-zero ✓ |
|  | Bent, asymmetric | Non-zero ✓ |
| HBr | Diatomic, polar | Non-zero ✓ |
|  | Linear, symmet

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