JEE Questions for Chemistry Haloalkanes And Haloarenes Quiz 5 - MCQExams.com


Chemistry-Haloalkanes and Haloarenes-4456.png
  • Substitution
  • Elimination
  • Addition
  • Rearrangement reaction
Which of the following reacts with chloroform and base to form phenyl isocyanide ?
  • Aniline
  • Phenol
  • Benzene
  • Nitrobenzene
Which of the following pairs is / are correctly matched ?
Chemistry-Haloalkanes and Haloarenes-4457.png
  • I alone
  • II and II
  • III and IV
  • IV, II, III and IV

Chemistry-Haloalkanes and Haloarenes-4458.png
  • BHC
  • DNA
  • DDT
  • RNA

Chemistry-Haloalkanes and Haloarenes-4459.png
  • RF > RCl > RBr > RI
  • RF > RBr > RCl >RI
  • RCl > RBr > RF > RI
  • RI > RBr > RCl > RF
Which among MeX, RCH2X, R2CHX, R3CX is most reactive towards SN2 reaction?
  • MeX
  • RCH2X
  • R2CHX
  • R3CX
Arrange the following halides in the decreasing order of SN1 reactivity :
Chemistry-Haloalkanes and Haloarenes-4460.png
  • I > II > III
  • II> I > III
  • II > III > I
  • III > II > I
Toluene on reaction with N-bromosuccinimide gives
  • p – Bromomethylbenzene
  • o – Bromomethylbenzene
  • Phenyl bromomethane
  • m – Bromomethylbenzene

Chemistry-Haloalkanes and Haloarenes-4462.png
  • meso – form
  • racemic mixture
  • d – form
  • l – form
The rate of SN2 reaction is maximum when the solvent is
  • CH3OH
  • H2O
  • DMSO
  • Benzene
Ethyl alcohol is used as a preservative for chloroform because it
  • prevents aerial oxidation of chloroform
  • prevents decomposition of chloroform
  • decomposes phosgene to CO and Cl2
  • removes phosgene by converting it to ethyl carbonate

Chemistry-Haloalkanes and Haloarenes-4464.png
  • chlorobenzene
  • benzene
  • toluene
  • biphenyl methane
Compound (A), C8H9Br gives a white precipitate when warmed with alcoholic AgNO3 . Oxidation of (A) gives an acid (B), C8H6O4. (B) easily forms anyhydride on heating. Identify the compound (A) .

  • Chemistry-Haloalkanes and Haloarenes-4465.png
  • 2)
    Chemistry-Haloalkanes and Haloarenes-4466.png

  • Chemistry-Haloalkanes and Haloarenes-4467.png

  • Chemistry-Haloalkanes and Haloarenes-4468.png
An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. H2SO4 and conc. HNO3. Indicate the correct statement from the following.
  • p -nitrotoluene is formed in excess
  • equimolar amounts of p -nitrotoluene and p -nitrochlorobenzene are formed
  • p -nitrochlorobenzene is formed in excess
  • m -nitrochlorobenzene is formed in excess
The major product of the following reaction is
Chemistry-Haloalkanes and Haloarenes-4471.png

  • Chemistry-Haloalkanes and Haloarenes-4472.png
  • 2)
    Chemistry-Haloalkanes and Haloarenes-4473.png

  • Chemistry-Haloalkanes and Haloarenes-4474.png

  • Chemistry-Haloalkanes and Haloarenes-4475.png
In SN 2 reactions, the correct order of reactivity for the following compounds CH3 Cl, CH3 CH2 Cl, (CH3)2 CHCl and (CH3)3 CCl is
  • CH3 Cl > (CH3)2 CHCl > CH2CH2 Cl > (CH3)3 CCl
  • CH3Cl > CH3 CH2 Cl > (CH3 )2 CHCl > (CH3)3CCl
  • CH3 CH2 Cl > CH3 Cl > (CH3 )2 CHCl > (CH3)3 CCl
  • (CH3 )2 CHCl > CH3 CH2 Cl > CH3 Cl > (CH3)3CCl
9.65 C of electric current is passed through fused anhydrous magnesium chloride. The magnesium metal thus, obtained is completely converted into a Grignard reagent. The number of moles of the Grignard reagent obtained is
  • 5 ×10-4
  • 1 ×10-4
  • 5 ×10-5
  • 1 ×10-5
Which of the following statements regarding the SN1 reaction shown by alkyl halide is not correct?
  • The added nucleophile plays no kinetic role in SN1 reaction
  • The SN1 reaction involves the inversion of configuration of the optically active substrate
  • The SN1 reaction on the chiral starting material ends up with racemisation of the product
  • The more stable the carbocation intermediate the faster the SN1 reaction
  • Polar protic solvent increases the rate of SN1 reaction.
On treating a mixture of two alkyl halides with sodium metal in dry ether, 2-methyl propane was obtained. The alkyl halides are
  • 2-chloropropane and chloromethane
  • 2-chloropropane and chloroethane
  • chloromethane and chloroethane
  • chloromethane and 1-chloropropane
The following compound on hydrolysis in aqueous acetone will give
Chemistry-Haloalkanes and Haloarenes-4478.png
  • mixture of (K ) and (L)
  • mixture of (K )and (M )
  • Only (M)
  • Only (K )
Compound `A ' reacts with alcoholic KOH to yield compound `B ' , which on ozonolysis followed by reaction with Zn /H2O gives methanal and propanal. Compound `A ' is
  • 1 -propanol
  • 1-butanol
  • 1-chlorobutane
  • 1 -chloropentane
Chlorobenzene can be prepared by reacting aniline with
  • Hydrochloric acid
  • Cuprous chloride
  • Chlorine in presence of anhydrous aluminium chloride
  • Nitrous acid followed by heating with cuprous chloride
The reaction of toluene with chlorine in presence of ferric chloride gives predominantly
  • Benzoyl chloride
  • m – Chlorotoluene
  • Benzyl chloride
  • o – and p – Chlorotoluene
n – Propyl bromide on treatment with ethanolic potassium hydroxide produces
  • Propane
  • Propene
  • Propyne
  • Propanol
Which of the following is called Sandmeyer reaction?

  • Chemistry-Haloalkanes and Haloarenes-4482.png
  • 2)
    Chemistry-Haloalkanes and Haloarenes-4483.png

  • Chemistry-Haloalkanes and Haloarenes-4484.png

  • Chemistry-Haloalkanes and Haloarenes-4485.png
When CH3CHClCH2CH3 is treated with alcoholic KOH, the major product is
  • CH3 – CH = CH – CH3
  • CH2 = CH – CH2 – CH3
  • CH3 – CHOH – CH2 – CH3
  • CH3 – CH2 – CH2 – CH3
A compound which does not give iodoform test on treatment with alkali and iodine is
  • Ethanol
  • Acetone
  • Diethyl ketone
  • Isopropyl alcohol
Which does not give iodoform reaction?
  • PhCOCH3
  • CH3OH
  • CH3CH2OH
  • CH3CHO
Silver benzoate reacts with bromine to form

  • Chemistry-Haloalkanes and Haloarenes-4487.png
  • 2)
    Chemistry-Haloalkanes and Haloarenes-4488.png

  • Chemistry-Haloalkanes and Haloarenes-4489.png
  • C6H5Br
Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4 –dinitrochlorobenzene is readily replaced.This is because
  • NO2 makes the ring electron rich at ortho and para positions
  • NO2 withdraws e– from meta – position
  • NO2 donates e– at m – position
  • NO2 withdraws e– from ortho/para – positions.
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