Haloalkenes and haloarenes

• A

• B

• C

• D

• A

• B

• C

• D

When excess chlorine is used in electrophilic substitution of toluene, which of the following dichloroarenes are formed?

• Ortho and meta

• Ortho and para

• Meta and para

• Ortho, meta and para

C-X bond is strongest in

• CH3-I

• CH3-Cl

• CH3-Br

• CH3-F

The compound C6H5F is an example of a _________ halide.

• Allylic

• Benzylic

• Aryl

• Vinylic

Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

• Ethyl chloride

• Isopropyl chloride

• Choro benzene

• Benzyl chloride

Assertion: KCN reacts with methyl chloride to give methyl isocyanide.

Reason: CN- is an ambidentate nucleophile.

• A

• B

• C

• D

In a SN1 reaction on chiral centres, there is

• 100% retention

• 100% inversion

• Racemization

• None

Fitting reaction can be used to prepare

• Toluene

• Acetophenon

• Diphenyl

• Chlorobenzene

The synthesis of alkyl fluoride is best accomplished by

• Finkelstein reaction

• Swartz reaction

• Free radical fluorination

• Sandmeyers reaction