The number of species having non-pyramidal shape among the following is

(A) (B) (C) (D)

Question

The number of species having non-pyramidal shape among the following is

(A)  (B)  (C)  (D)

Canvas Classes · Accepted Answer

Pyramidal shape requires the central atom to have 3 bonds + 1 lone pair (sp³ hybridization).

Step 1 — Analyse each species:

| Species | Bonds | Lone pairs | Hybridization | Shape |
|---------|-------|-----------|---------------|-------|
|  | 3 | 0 | sp² | Trigonal planar (non-pyramidal) ✓ |
|  | 3 | 0 | sp² | Trigonal planar (non-pyramidal) ✓ |
|  | 3 | 1 | sp³ | Pyramidal ✗ |
|  | 3 | 0 | sp² | Trigonal planar (non-pyramidal) ✓ |

Step 2: , ,  are non-pyramidal → 3 species

Answer: 3

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