Example 1 · difficulty 2/5
When 2-bromo-3-methylbutane, CH3–CH(Br)–CH(CH3)–CH3, is heated with alcoholic KOH, the major alkene formed is:
- A. 2-Methylbut-2-ene
- B. 3-Methylbut-1-ene
- C. 2-Methylbut-1-ene
- D. 2-Methylbuta-1,3-diene
2018 source guide · Chemistry
NEET 2018 Chemistry Haloalkanes and Haloarenes 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.
What to master
preparation, substitution, elimination and aryl-halide reactivity.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 1/5
Chloroform is stored in dark-coloured, tightly stoppered bottles because, on prolonged exposure to air and light, it:
- A. decomposes to yield carbon tetrachloride and hydrogen
- B. evaporates rapidly, losing purity
- C. undergoes photolytic reduction to methane
- D. is slowly oxidised to the highly poisonous gas phosgene, COCl2
Example 3 · difficulty 1/5
What is the correct IUPAC name of CH3–CH(Cl)–CH2–CH3?
- A. 2-Chlorobutane
- B. 1-Chlorobutane
- C. 2-Chloro-2-butene
- D. Butan-2-yl chloride
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 2018 Chemistry Haloalkanes and Haloarenes 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.