2018 source guide · Chemistry

NEET 2018 Chemistry Chemical Kinetics Questions

Use this page to connect the official 2018 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

rate laws, order, integrated equations, half-life and activation energy.

Original practice preview

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

Example 1 · difficulty 2/5

The acid-catalysed hydrolysis of an ester, CH₃COOC₂H₅ + H₂O → CH₃COOH + C₂H₅OH, follows first-order kinetics even though water is a reactant. This pseudo-first-order behaviour arises because:

A. water acts as a catalyst in the reaction
B. the reaction is actually zero order with respect to the ester
C. water is present in such large excess that its concentration remains practically constant
D. the rate of the reaction is independent of the ester concentration

Example 2 · difficulty 4/5

A first-order reaction is 20% complete in 10 minutes. The time required for 75% completion is closest to:

A. 40 min
B. 50 min
C. 31 min
D. 62 min

Example 3 · difficulty 1/5

The average rate of disappearance of a reactant R over a time interval is written as:

A. −Δ[R]/Δt
B. +Δ[R]/Δt
C. −Δt/Δ[R]
D. [R]Δt

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 Kinetics →

Frequently asked questions

Are these official NEET 2018 Chemistry Chemical Kinetics 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 2018 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.