NCERT/Class 11/Chemistry/Hydrocarbons

Hydrocarbons

Class 11 · Chemistry

65 questions14 easy37 medium14 hard

Sample Questions

Q1.The addition of HBr to propene (CH₃CH=CH₂) follows Markovnikov's rule. The major product is:

  • A2-Bromopropane (CH₃CHBrCH₃)
  • B1-Bromopropane (CH₃CH₂CH₂Br)
  • C3-Bromopropane
  • DEqual mixture of both

Q2.Which of the following is a characteristic property of alkynes?

  • ATerminal alkynes give a precipitate with ammoniacal silver nitrate (Tollens' reagent)
  • BAlkynes react with Br₂ water faster than alkenes
  • CAlkynes undergo oxidation with KMnO₄ to give ketones only
  • DAlkynes are sp³ hybridized

Q3.The Friedel-Crafts alkylation of benzene involves reaction with:

  • AAlkyl halide in presence of AlCl₃
  • BAcyl halide in presence of AlCl₃
  • CNitric acid and sulfuric acid
  • DAlkyl halide without catalyst

Q4.The Hückel's rule for aromaticity states that aromatic compounds must have how many π electrons?

  • A(4n + 2) π electrons where n = 0, 1, 2...
  • B(4n) π electrons where n = 1, 2, 3...
  • C6 π electrons exactly
  • DAny even number of π electrons

Q5.The hybridization and bond angle in acetylene (HC≡CH) is:

  • Asp hybridization, 180° bond angle (linear)
  • Bsp² hybridization, 120°
  • Csp³ hybridization, 109.5°
  • Dsp hybridization, 109.5°

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
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Concepts Covered

-NO2 group-OH group1,4-cyclohexadiene2-bromobutane2-bromopropane2-chloropropane2-methylpropene4n electrons4n+2 ruleAlCl3 catalystBaeyer's testBirch reductionC:H ratioC=C cleavageCIP priority rulesCNG compositionCO2 and H2OE-Z nomenclatureEWG effectFriedel-Crafts acylationFriedel-Crafts alkylationHückel's ruleIUPAC nomenclatureKMnO4 oxidationKekulé structureLPG compositionLondon forcesMarkovnikov additionMarkovnikov's ruleNO2+ electrophileNewman projectionZ isomerZaitsev's ruleacetaldehydeacetophenoneacetylene geometryacetylene hydrationacidic C-Hacidity of hydrocarbonsactivating groupsacylium ionaddition to alkenesalkane isomersalkane reactionsalkanes and alkenesalkene to alkanealkenesalkynesangle strainanti additionanti conformationanti-Markovnikov additionanti-aromaticityantiknock propertyaromatic combustionaromatic reductionaromatic stabilityaromaticityaromatizationbenzenebenzene pi bondsbenzene preparationbenzene synthesisbenzene toxicitybenzenesulfonic acidboiling pointboiling point of alkanesboiling point of geometric isomersbranched alkenesbranching effectbromine water testbromonium ionbut-1-ynebutane conformationcarbon and hydrogencarbonyl compoundscarboxylic acidscarcinogenicitycatalytic hydrogenationcatalytic reformingchiral centerchlorobenzenechlorobenzene directive effectcis vs transcis-trans isomerscis-trans requirementcombustion of alkanescomplete combustioncrackingcrystal packingcyclobutadienecyclohexane to benzenecyclopropane reactivitydeactivating groupsdeactivating ortho-para directordecarboxylationdecolorizationdehydration of ethanoldehydrogenationdehydrohalogenationdelocalizationdihydroxylationdipole momentelectrophilic additionelectrophilic addition exclusionelectrophilic aromatic substitutionethane conformationethanol synthesisetheneethene preparationfractional distillationfree radical chainfree radical mechanismfree radical substitutionfuelfuel qualitygeometric isomerismgeometric isomerism conditiongeometric isomershalogen reactivity orderhalogenation mechanismhalogenation selectivityhalogens in EAShydration of ethenehydrocarbon fractionshydrocarbonsindustrial preparationindustrial processketo-enol tautomerismlaboratory synthesislinear moleculemelting pointmeta directing groupsmethanemethane chlorinationmethyl group effectmolecular sizemore substituted alkenenatural gasnitration mechanismnitrobenzene reactivitynitronium ionoctane numberoptical isomerismorganic compoundsortho-para directing groupsoxidative cleavageoxidative ozonolysisozonolysispentaneperoxide effectpetroleumpetroleum compositionpolycyclic aromatic hydrocarbonspropane butanepropane halogenationpropene + HBrreductionregioselectivityresonance energyrestricted rotationring strains-characterselectivitysigma bondssigma bonds onlysilver acetylidesoda limesodium acetylidesooty flamesp hybridizationstaggered formstructural elucidationsubstituent differencesulfonationterminal alkyne acidityterminal alkyne reactionterminal alkynestoluene reactivitytorsional strainunsaturation testvicinal diol

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