Question 1

Which of the following compounds has the highest boiling point?

Accepted Answer

1-Iodobutane has the highest boiling point among the given alkyl halides because boiling point increases with an increase in the size and mass of the halogen atom due to greater van der Waals forces.

Question 2

Which of the following undergoes $SN1$ reaction most readily?

Accepted Answer

Tert-butyl chloride undergoes $SN1$ reaction most readily because it forms a tertiary carbocation, which is highly stable due to hyperconjugation and inductive effects.

Question 3

What is the major product formed when chlorobenzene is treated with $Cl2$ in the presence of anhydrous $FeCl3$?

Accepted Answer

Reaction of chlorobenzene with chlorine in the presence of anhydrous $FeCl3$ gives a mixture of 1,4-dichlorobenzene and 1,2-dichlorobenzene, where 1,4-dichlorobenzene (p-isomer) is the major product due to lesser steric hindrance.

Question 4

Finkelstein reaction is used for the preparation of:

Accepted Answer

Finkelstein reaction is used for the preparation of alkyl iodides by treating alkyl chlorides or bromides with sodium iodide in dry acetone.

Question 5

Which reagent is used in Swarts reaction?

Accepted Answer

Swarts reaction is used to prepare alkyl fluorides by heating alkyl chloride/bromide in the presence of metallic fluorides like $AgF$, $Hg2F2$, $CoF2$, or $SbF3$.

Haloalkanes and Haloarenes — NCERT Class 12 Chemistry Important Questions & Revision Notes