Question 1. The isoelectronic pair is (a) Cl 2 O, ICl 2 – (b) ICl 2 – ClO 2 (c) IF 2 + , I 3 – (d) ClO 2 – , ClF 2 + Answer Answer: (d) ClO 2 – , ClF 2 + Question 2. The correct order of acid strength is: (a) HClO 4 < HClO 3 < HClO 2 < HClO (b) HClO 2 < HClO 3 < HClO 4 < HClO (c) HClO 4 < HClO < HClO 3 < HClO 2 (d) HClO < HClO 2 < HClO 3 < HClO 4 Answer Answer: (d) HClO < HClO 2 < HClO 3 < HClO 4 Question 3. In BrF 3 , molecule, the lone pairs occupy equatorial positions to minimise. (a) lone pair-bond pair repulsions only (b) bond pair-bond pair repulsions only (c) lone pair-lone pair and lone pair-bond pair repulsions (d) lone pair-lone pair repulsions only. Answer Answer: (c) lone pair-lone pair and lone pair-bond pair repulsions Question 4. The ONO angle is maximum in (a) NO 3 – (b) NO 2 – (c) NO 2 (d) NO 2 + Answer Answer:...