NCERT/Class 11/Chemistry/Hydrocarbons

Hydrocarbons

Class 11 · Chemistry

65 questions14 easy37 medium14 hard

Sample Questions

Q1.The Friedel-Crafts acylation of benzene with acetyl chloride (CH₃COCl) and AlCl₃ gives:

  • AAcetophenone (methyl phenyl ketone, C₆H₅COCH₃)
  • BChlorobenzene
  • CBenzaldehyde
  • DBenzoic acid

Q2.The number of pi bonds in benzene is:

  • A3 (in classical Kekulé structure) or described as delocalized
  • B6
  • C1
  • D0 (all sigma bonds)

Q3.Hydrocarbons are compounds containing only:

  • ACarbon and hydrogen
  • BCarbon and oxygen
  • CCarbon, hydrogen, and nitrogen
  • DCarbon only

Q4.The IUPAC name of the alkane with molecular formula C₅H₁₂ and a straight chain is:

  • APentane
  • BButane
  • CIsopentane
  • DNeopentane

Q5.The -NO₂ group in nitrobenzene directs incoming electrophiles to the:

  • AMeta position
  • BOrtho position
  • CPara position
  • DOrtho and para positions

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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