AP EAPCET (Engineering) Haloalkanes and Haloarenes — practice questions
39 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice AP EAPCET (Engineering) Haloalkanes and Haloarenes in the app →The C–X bond enthalpies follow the order:Among alkyl halides, the order of reactivity towards nucleophilic substitution (for the same R group) is:Which of the following reagents is preferred for converting an alcohol R-OH into an alkyl chloride because theThe order of reactivity of alcohols with a given haloacid (HCl, HBr, HI) is:The reaction of alkyl chloride/bromide with NaI in dry acetone to form alkyl iodide is called:Among methyl chloride, methyl bromide and methyl iodide, the order of boiling points is:Among 1-bromobutane, 2-bromobutane, and 2-bromo-2-methylpropane (isomers, same MW), the boiling point order isIn an SN2 reaction (e.g., CH₃Br + OH⁻):In an SN1 reaction (e.g., tert-butyl bromide + OH⁻):Why is the carbocation formed in SN1 reactions racemised when starting from an optically active substrate?Allylic and benzylic halides react readily by SN1 because:Zaitsev's (Saytzeff's) rule states that in a dehydrohalogenation reaction:In an alkyl halide, the carbon attached to the halogen is called α-carbon and the adjacent carbon is the β-carGrignard reagent (RMgX) is prepared by:Why must Grignard reagents be prepared and handled in scrupulously dry conditions?The Wurtz reaction is best described as:Haloarenes (e.g., chlorobenzene) are much less reactive than haloalkanes toward nucleophilic substitution becaThe C-Cl bond length in chlorobenzene is **shorter** (169 pm) than in methyl chloride (177 pm) because:The presence of an electron-withdrawing group like -NO₂ at the **ortho** or **para** position of haloarene:In electrophilic substitution reactions of haloarenes (e.g., chlorination of chlorobenzene), the halogen substNitration of chlorobenzene gives predominantly:A molecule that is non-superimposable on its mirror image is called:Stereoisomers that are non-superimposable mirror images of each other are called:A racemic mixture is:Among CH₃Cl, CH₃Br, CH₃I, the order of dipole moments is approximately:Why does the reaction of haloalkanes with KCN give predominantly an alkyl cyanide (R-CN), but with AgCN gives Haloalkane has general formula:Haloarene example:Classification of haloalkane by C bearing halogen: 1° if X is on:IUPAC name of CH₃CH₂CH₂Cl:Polarity of C-X bond order (most polar first):Reactivity order for SN2 reactions (1°, 2°, 3°):Finkelstein reaction:Grignard reagent: R-X + Mg in dry ether gives:Reaction of Grignard with formaldehyde HCHO gives:Reactivity of haloalkanes in SN2 by leaving group:For SN1 reaction, rate is independent of:Reaction of (CH₃)₃C-Br with H₂O gives:Saytzeff product from 2-bromo-3-methylbutane + base: