JEE Hydrocarbons Quiz
Chapter-wise practice on alkanes, alkenes, alkynes and aromatic hydrocarbons - preparation, reaction mechanisms, Markovnikov's rule and electrophilic aromatic substitution.
Skill map
Levels in this jee hydrocarbons quiz
Every question is generated fresh by AI and calibrated to your level - clear a level and the next one gets harder. Miss one and the AI tutor explains Hydrocarbons until it sticks, then aims a follow-up at the gap. Want to grind one level? Start the quiz and type that sub-topic as your own.
Exam focus
How Hydrocarbons is asked
The gateway to Organic Chemistry, and mostly reaction-based rather than calculation-based. The efficient way to prepare it is by mechanism family rather than by compound class - once you can predict where an electrophile attacks and which intermediate is more stable, most individual reactions stop needing separate memorisation.
Cheat sheet
Hydrocarbons formulas worth memorising
| Quantity | Formula |
|---|---|
| Degree of unsaturation | DoU = (2C + 2 + N − H − X)/2 |
| Carbocation stability | 3° > 2° > 1° > methyl |
| Alkyne acidity | terminal alkyne > alkene > alkane |
Marks lost here
Common mistakes in Hydrocarbons
- Applying Markovnikov's rule when peroxides are present. HBr with peroxide adds anti-Markovnikov by a free-radical route - and the effect is specific to HBr, not to HCl or HI.
- Mixing up ortho/para and meta directors. Electron-donating groups activate the ring and direct ortho/para; electron-withdrawing groups deactivate and direct meta. Halogens are the exception - deactivating yet ortho/para directing.
- Forgetting that only terminal alkynes are acidic. The acidic hydrogen is the one on the sp carbon, so internal alkynes give no reaction with sodium amide, which is a standard distinguishing test.
- Predicting ozonolysis products by breaking the wrong bond. Ozonolysis cleaves the carbon-carbon double bond and puts an oxygen on each carbon, and working backwards from the products is a common question format.
- Applying Hückel's rule without checking planarity and cyclic conjugation. A compound needs to be cyclic, planar and fully conjugated with 4n + 2 pi electrons - all four conditions, not just the electron count.
Game rules
How a round works
- 01Spawn
Press play - the AI generates Hydrocarbons questions in seconds.
- 02Level up
Answer to earn XP and build a streak. Difficulty adapts to your accuracy and speed.
- 03Learn or lose
Every answer - right or wrong - gets an AI tutor explanation. Wrong answers respawn as follow-ups.
Leaderboard
Hydrocarbons high scores
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Player's guide
JEE Hydrocarbons Quiz - FAQs
How do I remember Markovnikov's rule without confusion?
Do not memorise the outcome - work through the intermediate. The electrophile adds so as to produce the more stable carbocation, and since tertiary beats secondary beats primary, the product follows. That reasoning also gives you the anti-Markovnikov result, since the peroxide route goes through a radical instead.
Why are terminal alkynes acidic when alkanes are not?
The acidic hydrogen sits on an sp-hybridised carbon, which has 50% s character and holds the resulting negative charge closer to the nucleus. More s character means a more stable conjugate base, so acidity increases from sp³ to sp² to sp.
Is the jee hydrocarbons quiz free?
Yes - completely free, with no sign-up required. Type a topic, press start, and the AI generates an adaptive Hydrocarbons quiz with an explanation for every answer.
Can teachers host this jee hydrocarbons quiz live for a class?
Yes - create a free teacher account, host a live room on "Hydrocarbons", and students join with a 6-character code at quff.in/join. No student accounts needed.
From the blog
Hydrocarbons guides & reading
JEE Hydrocarbons: 30 Practice Questions with Solutions
Thirty solved Hydrocarbons questions, organised by mechanism family rather than by compound class - which is how the reactions actually connect.
Exam PrepJEE Organic Chemistry (GOC): 30 Practice Questions Solved
Thirty solved GOC questions. Get the stability orders right and the rest of Organic stops being memorisation.
Exam PrepJEE Biomolecules: 30 Practice Questions with Solutions
Thirty solved Biomolecules questions. A short, self-contained, recall-heavy chapter - which makes it the fastest to secure before the exam.
More exam prep quizzes
Ready, player?
Six adaptive Hydrocarbons questions. About two minutes. Climb the podium.