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Chemistry

Hydrocarbons

A Chemistry chapter of the NEET syllabus, and how to practise it for the computer-based exam.

Exam rules change between cycles. Confirm dates, syllabus and pattern against NTA's official site. We are not NTA.

Weightage: what the paper actually did

Hydrocarbons carried 4 questions in the NEET 2026 paper. One paper is a data point, not a destiny: NTA moves weight between chapters every cycle, which is why the weightage tables deserve care. The stable facts are the paper's shape: 180 questions, 720 marks, +4 right, −1 wrong.

Sample PYQs from this chapter

Real questions NTA asked from Hydrocarbons, with the answer and the working. Try before you peek.

Question 1 · NEET 2020

Which of the following alkane cannot be made in good yield by Wurtz reaction?
  1. A.2,3-Dimethylbutane
  2. B.n-Heptane
  3. C.n-Butane
  4. D.n-Hexane
Answer and explanation

Answer: B

A Wurtz reaction with one alkyl halide gives a symmetrical alkane with an even total carbon count. Making n-heptane requires two different halides, producing a mixture, so it cannot be obtained in good yield. Chapter: Hydrocarbons.

Question 2 · NEET 2026

Among the following, the compound having conjugated double bonds is
  1. A.hepta-1,3-diene
  2. B.hepta-1,4-diene
  3. C.hepta-1,5-diene
  4. D.hepta-1,6-diene
Answer and explanation

Answer: A

Double bonds are conjugated when they alternate with exactly one single bond, letting the p orbitals overlap continuously. In hepta-1,3-diene the unsaturations are at C1-C2 and C3-C4, separated by the single C2-C3 bond, so the system is conjugated. The others place two or more single bonds between the double bonds, making them isolated. NCERT Class 11, Hydrocarbons.

How to practise Hydrocarbons

Chapter by chapter, against real past-paper questions, on a screen: NEET is computer based from 2027. Read the chapter once, then attempt its PYQs until your accuracy stops climbing, and let the wrong answers tell you which lines to reread. If the chapter keeps refusing to stick, that has its own guide. There is also a free NEET mini mock with answers.

Nearby Chemistry chapters

Questions

How many questions did Hydrocarbons have in NEET 2026?

Hydrocarbons carried 4 questions in the NEET 2026 paper. Weightage shifts between cycles, so treat it as a probability, not a promise.

Where can I practise Hydrocarbons PYQs for NEET?

Explore available chapter-wise NEET practice in BrainIt, free until the 2027 exam. Review explanations and track chapter accuracy to guide your revision. Sample questions from this chapter are on this page.

Is Hydrocarbons important for NEET 2027?

It is part of the Chemistry syllabus the paper draws from, and NEET 2027 is computer based, so practise it on a screen. Your own accuracy in the chapter matters more than any weightage table: a heavy chapter you already score well on needs less time than a light one you keep missing.

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