Example 1 · difficulty 2/5
As predicted by VSEPR theory, the molecular shape of ClF₃ and the hybridisation of its central chlorine atom are, respectively:
- A. Trigonal bipyramidal, sp3d
- B. Bent (angular), sp³
- C. T-shaped, sp³d
- D. See-saw shaped, sp³d
2016 source guide · Chemistry
NEET 2016 Chemistry Chemical Bonding Questions
Use this page to connect the official 2016 paper with current Chemistry practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
Lewis structures, VSEPR, hybridisation, molecular orbitals and intermolecular forces.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 3/5
Applying molecular orbital theory to the superoxide ion O₂⁻ (17 electrons), its calculated bond order and magnetic behaviour are:
- A. Bond order 1.5, paramagnetic
- B. Bond order 2.5, paramagnetic
- C. Bond order 2.0, diamagnetic
- D. Bond order 1.0, diamagnetic
Example 3 · difficulty 3/5
NH₃ (μ ≈ 1.47 D) and NF₃ (μ ≈ 0.24 D) are both pyramidal molecules with sp³-hybridised nitrogen, yet their dipole moments differ enormously. The correct explanation is:
- A. NF₃ is planar triangular while NH₃ is pyramidal, so NF₃ achieves complete internal cancellation of bond dipoles
- B. The N–F bond is longer than the N–H bond, which lowers the product of effective charge and distance in NF₃
- C. Fluorine atoms pull the nitrogen lone pair entirely onto themselves, eliminating its contribution to the dipole
- D. In NH₃ the N–H bond moments point toward the lone-pair side and reinforce it, whereas in NF₃ the N–F bond moments point away and oppose the lone-pair moment
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2016 Chemistry Chemical Bonding PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2016 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.