CBSE Class 12 Haloalkanes and Haloarenes — practice questions
18 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice CBSE Class 12 Haloalkanes and Haloarenes in the app →Primary alkyl halides typically undergo nucleophilic substitution by:A tertiary alkyl halide like t-butyl bromide in aqueous ethanol on the bench gives a racemic mixture because:Heating 2-bromobutane with alcoholic KOH on the lab bench primarily gives:Chlorobenzene is much less reactive than chloroethane toward nucleophilic substitution because:Haloalkanes are compounds derived from alkanes by$\mathrm{(CH_3)_3CCl}$ is classified as aWhich haloalkane is MOST reactive toward $\mathrm{S_N 2}$ substitution (with a typical nucleophile like $\mathThe reactivity order for the $\mathrm{S_N 1}$ mechanism among haloalkanes isThe WURTZ REACTION couples two alkyl halides with sodium metal in dry ether to giveFINKELSTEIN REACTION uses NaI (sodium iodide) in dry ACETONE to convert alkyl chlorides into alkyl iodides. ThThe reactivity of haloalkanes toward nucleophilic substitution generally follows the orderA SN2 reaction on a chiral carbon (with a single stereocentre) results inThe IUPAC name of $\mathrm{(CH_3)_2CH{-}CH_2Br}$ isA GRIGNARD REAGENT is formed by reacting an alkyl halide withWhen 1-bromopropane is heated with concentrated alcoholic KOH, the major product isSAYTZEFF'S RULE for elimination reactions states thatChlorobenzene ($\mathrm{C_6H_5Cl}$) is MUCH LESS reactive toward nucleophilic substitution than chloroethane. $\mathrm{CHCl_3}$ (chloroform) on prolonged storage in the air may be partially oxidised to a HIGHLY POISONOUS