Match List I (Molecule) with List II (Bond Order):

(a) → (i) 1
(b) → (ii) 2
(c) → (iii) 0
(d) → (iv) 3

Choose the correct answer:

Question

Match List I (Molecule) with List II (Bond Order):

(a)  → (i) 1
(b)  → (ii) 2
(c)  → (iii) 0
(d)  → (iv) 3

Choose the correct answer:

Canvas Classes · Accepted Answer

Step 1 — Calculate bond orders:

(20e⁻): All bonding and antibonding MOs filled equally → BO = 0 → (iii)

(14e⁻): BO = (10−4)/2 = 3 → (iv)

(18e⁻): BO = (10−8)/2 = 1 → (i)

(16e⁻): BO = (10−6)/2 = 2 → (ii)

Matching: (a)→(iii), (b)→(iv), (c)→(i), (d)→(ii)

Answer: Option (2)

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