2021 source guide · Chemistry

NEET 2021 Chemistry Chemical Bonding Questions

Use this page to connect the official 2021 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.

Practice 139 verified questions →Check official NTA archive ↗

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 1 · difficulty 2/5

Which observation about the two oxygen-oxygen bonds in ozone is consistent with resonance?

A. One bond is permanently single and the other is permanently double
B. Both bonds have the length of an isolated O-O single bond
C. Both bonds have the length of an isolated O=O double bond
D. Both bonds have equal lengths intermediate between single and double bonds

Example 2 · difficulty 3/5

In a canonical Lewis structure of CO₃²⁻ containing one C=O bond and two C-O single bonds, what is the formal charge on each singly bonded oxygen atom?

A. −1
B. 0
C. +1
D. −2

Example 3 · difficulty 2/5

Which statement correctly describes resonance in a molecule or ion?

A. The species rapidly changes from one canonical form to another
B. The actual species is a resonance hybrid that is more stable than any one canonical form
C. Canonical forms differ in the positions of atomic nuclei
D. Only the least stable canonical form contributes to the actual structure

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

Chemical Bonding and Molecular Structure →

Frequently asked questions

Are these official NEET 2021 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 2021 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.