Class 11 Chemistry — Chapter 9: Hydrocarbons
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 11 Chemistry Chapter 9, "Hydrocarbons", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
"Hydrocarbons" is one of the chapters where reactions, named concepts, and balanced numerical work really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Hydrocarbons, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 11 Chemistry mastery score. A few sample questions are shown below; sign in free to practise all 90.
Key concepts: Hydrocarbons (Class 11 Chemistry)
This chapter covers alkanes, alkenes, alkynes and aromatic hydrocarbons — their preparation, properties and characteristic reactions.
- Alkanes
- Saturated hydrocarbons (CₙH₂ₙ₊₂); largely unreactive but undergo free-radical substitution (e.g. halogenation).
- Alkenes
- Have a C=C double bond (CₙH₂ₙ); undergo electrophilic addition following Markovnikov's rule.
- Alkynes
- Have a C≡C triple bond (CₙH₂ₙ₋₂); terminal alkynes are weakly acidic.
- Markovnikov & peroxide effect
- In HX addition the H adds to the carbon with more hydrogens; peroxides reverse this (anti-Markovnikov, radical).
- Aromatic hydrocarbons
- Benzene and its derivatives; stabilised by resonance and undergo electrophilic substitution (nitration, halogenation).
Key formulas — Hydrocarbons
💡 Exam tips for Hydrocarbons
- Markovnikov: H adds to the carbon already having more H's; peroxide (radical) addition reverses it.
- Benzene prefers substitution (not addition) because aromatic stability must be preserved.
Sample questions
General formula of alkenes:
One C=C double bond.
Alkynes have ___ bonds between carbons.
C≡C; sp hybridised.
Markovnikov's rule applies to addition of HX to:
H goes to C with more H; X to other C.
Hydrocarbons — FAQs
What are the key concepts in Class 11 Chemistry Hydrocarbons?+
This chapter covers alkanes, alkenes, alkynes and aromatic hydrocarbons — their preparation, properties and characteristic reactions. Key ideas include Alkanes, Alkenes, Alkynes, Markovnikov & peroxide effect, Aromatic hydrocarbons.
What does Class 11 Chemistry Chapter 9 (Hydrocarbons) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Hydrocarbons" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams, JEE Main, JEE Advanced and NEET UG.
Are these "Hydrocarbons" questions free to practise?+
Yes — sign in with Google to practise "Hydrocarbons" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Hydrocarbons" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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