Number of compounds with one lone pair of electrons on the central atom amongst the following is

Question

Canvas Classes · Accepted Answer

Step 1 — Count lone pairs on central atom for each species:

| Species | Bonding pairs | Lone pairs on central atom |
|---------|--------------|---------------------------|
|  | 2 | 1 |
|  | 2 | 2 |
|  | 4 | 1 |
|  | 3 | 2 |
|  | 3 | 1 |
|  | 5 | 1 |
|  | 4 | 2 |

Step 2 — Species with exactly ONE lone pair:
-  ✓
-  ✓
-  ✓
-  ✓

Answer: 4

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