Compounds with One Lone Pair on Central Atom

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

O₃, H₂O, SF₄, ClF₃, NH₃, BrF₅, XeF₄

Correct Answer: 4

Explanation

We count compounds in which the central atom has exactly one lone pair.

• O₃ → Central O has 1 lone pair ✔
• H₂O → Central O has 2 lone pairs ✘
• SF₄ → Central S has 1 lone pair ✔
• ClF₃ → Central Cl has 2 lone pairs ✘
• NH₃ → Central N has 1 lone pair ✔
• BrF₅ → Central Br has 1 lone pair ✔
• XeF₄ → Central Xe has 2 lone pairs ✘

Total compounds with exactly one lone pair on central atom = 4

Related JEE Main Chemical Bonding Questions