Example 1 · difficulty 2/5
A solution in a cell of cell constant 1.25 cm⁻¹ has a measured conductance of 4.0 × 10⁻³ S. Its conductivity is:
- A. 5.0 × 10⁻³ S cm⁻¹
- B. 3.2 × 10⁻³ S cm⁻¹
- C. 0.3125 S cm⁻¹
- D. 1.25 × 10⁻³ S cm⁻¹
2020 source guide · Chemistry
NEET 2020 Chemistry Electrochemistry Questions
Connect the official 2020 paper with current Chemistry practice without labelling original previews as PYQs.
250 original questions · explicit provenance labels
ChemistryPlate 37
NeetVellum atlas · fig. chemistry
37
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 2 · difficulty 2/5
On raising temperature over an ordinary working range, which trend is generally expected for metallic and electrolytic conductors?
- A. Conductivity increases for both because all charge carriers always become more mobile.
- B. Metallic conductivity generally decreases, whereas electrolytic conductivity generally increases.
- C. Metallic conductivity generally increases, whereas electrolytic conductivity generally decreases.
- D. Conductivity remains constant for metals but becomes zero for electrolytes.
Example 3 · difficulty 2/5
A fixed volume of an electrolyte solution is diluted substantially with water at constant temperature. What happens to its conductivity, and why?
- A. It increases because dilution creates an unlimited number of ions.
- B. It remains unchanged because conductivity is independent of concentration.
- C. It decreases because the number of ions per unit volume becomes smaller.
- D. It becomes equal to metallic conductivity because water supplies electrons.
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 2020 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 2020 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.