Chemistry · Class 11 · Chapter 9
Hydrocarbons
13 lessons 110 min 2 simulations
This chapter surveys compounds of carbon and hydrogen only. It works through alkanes (naming, preparation, properties, free-radical halogenation and conformations), alkenes (the double bond, cis-trans isomerism, preparation and addition reactions including Markovnikov's rule and the peroxide effect), alkynes (the triple bond, acidity and additions) and benzene (resonance, aromaticity, electrophilic substitution and directive influence), ending with the toxicity of some aromatic hydrocarbons.
What the exam asks
NEET asks for the product of an addition (Markovnikov or peroxide), the right reagent for a conversion (Wurtz, Kolbe, Lindlar, Baeyer, ozonolysis, Friedel-Crafts), boiling-point and acidity orders, cis-trans isomerism, conformer stability and whether a group is ortho/para or meta directing. Marks are usually lost on exceptions: HBr only for the peroxide effect, halogens as deactivating o/p directors, and even-carbon limits of Wurtz and Kolbe.
Lessons
13 lessons · 110 min
1Classification and the alkane familyNCERT §9.1, §9.27 min2Naming alkanes and chain isomersNCERT §9.2.17 min3Preparation of alkanesNCERT §9.2.27 min4Physical properties of alkanesNCERT §9.2.36 min5Chemical reactions of alkanesNCERT §9.2.37 min6Conformations of ethaneNCERT §9.2.411 min 1 sim7Alkenes: double bond, names and isomersNCERT §9.3.1–§9.3.37 min8Preparation of alkenesNCERT §9.3.47 min9Properties and reactions of alkenesNCERT §9.3.512 min 1 sim10Alkynes: triple bond, preparation and reactionsNCERT §9.48 min11Benzene: structure and aromaticityNCERT §9.5.1–§9.5.47 min12Electrophilic substitution and directive influenceNCERT §9.5.5, §9.5.6, §9.68 min13Chapter reviewMust-know facts, traps and formulas16 min