2021 source guide · Chemistry

NEET 2021 Chemistry Electrochemistry 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 118 verified questions →Check official NTA archive ↗

What to master

conductance, electrochemical cells, the Nernst equation and electrolysis.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 3/5

Why is an alternating-current source used when measuring the resistance of an ionic solution in a conductivity cell?

A. It converts the electrolyte into an electronic conductor.
B. It makes the cell constant independent of electrode geometry.
C. It permanently deposits all cations and anions on the same electrode.
D. It minimises electrolysis and electrode polarisation that would disturb the resistance measurement.

Example 2 · difficulty 2/5

A solution has conductivity 2.0 × 10⁻² S cm⁻¹. What is the same conductivity expressed in S m⁻¹?

A. 2.0 S m⁻¹
B. 2.0 × 10⁻⁴ S m⁻¹
C. 0.20 S m⁻¹
D. 200 S m⁻¹

Example 3 · difficulty 3/5

Two cells X and Y contain the same solution at the same temperature. Relative to Y, cell X has twice the electrode area and half the electrode separation. What is the ratio of their measured conductances, Gₓ/Gᵧ?

A. 1/4
B. 4
C. 1/2
D. 2

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

Electrochemistry →

Frequently asked questions

Are these official NEET 2021 Chemistry Electrochemistry 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.