Chemical Bonding and Molecular Structure: NEET questions with solutions

Tests how precisely a student applies VSEPR theory, hybridisation, and molecular orbital theory to predict molecular shape, bond order, and polarity. Most NEET marks are lost confusing electron-domain geometry with molecular shape, forgetting lone-pair placement rules, or assuming polar bonds always give a polar molecule.

1. 1.In ethyne (HC≡CH), what is the hybridisation of each carbon atom, and how many sigma (σ) bonds does each carbon form?HybridisationEasySingle correct
2. 2.Sulfur hexafluoride (SF₆) has 6 S–F bond pairs and no lone pair on the central sulfur atom. What molecular shape does VSEPR theory predict…VSEPR theoryEasySingle correct
3. 3.Between hydrogen fluoride (HF) and hydrogen chloride (HCl), which molecule(s) show intermolecular hydrogen bonding?Hydrogen bondingEasySingle correct
4. 4.Using molecular orbital theory, what is the bond order of the nitrogen molecule (N₂), and is N₂ paramagnetic or diamagnetic?Molecular orbital theory / bond orderMediumSingle correct
5. 5.Boron trifluoride (BF₃) contains three polar B–F bonds, yet its measured net dipole moment is zero. What is the correct explanation?Dipole momentMediumSingle correct
6. 6.What is the hybridisation of sulfur and the molecular shape of SF₄?Hybridisation and VSEPR (expanded octet)MediumSingle correct
7. 7.The Assertion (A) and Reason (R) below concern the shape of a xenon fluoride. Read them and choose the option that correctly describes their…Hybridisation and molecular shapeMediumAssertion–Reason
8. 8.Two statements about the bond orders of O₂, O₂⁺ (dioxygenyl cation), and O₂⁻ (superoxide ion) are given below. Study them and choose the…Molecular orbital theory / bond order trendsHardStatement based
9. 9.Chlorine trifluoride (ClF₃) has 3 Cl–F bond pairs and 2 lone pairs on the central chlorine atom. What molecular shape does VSEPR theory…VSEPR theory (expanded octet)HardSingle correct