Methods Of Preparation Of Haloalkanes

This reaction is known as Swarts reaction.

Concept:

Step 1: Identify.
(i) tertiary, (ii) primary, (iii) secondary

Step 2: Order.

Step 1: Understanding the Concept:
SN2 reactivity: Least steric hindrance around the carbon bearing the leaving group → fastest. Order: primary secondary tertiary. Benzylic halides are reactive, but bulky groups hinder.

Step 2: Detailed Explanation:
(iv) : Benzylic, primary → most reactive.
(i) : Secondary benzylic.
(ii) : Secondary but with two large aryl groups → more hindered than (i).
(iii) : Tertiary benzylic → most hindered → least reactive.
Order: (iv) (i) (ii) (iii).

Step 3: Final Answer:
The correct order is (iv) (i) (ii) (iii).

Step 1: Understanding the Concept:
Wurtz reaction: Alkyl halide + Na in dry ether gives alkane with double the number of carbon atoms.

Step 2: Detailed Explanation:

Bromoethane (C2) gives n-butane (C4).

Step 3: Final Answer:
The product is n-butane.

Concept:
• Swarts reaction replaces Cl by F using SbF

Step 1: Freon-12
Freon-12 =

Step 2: Starting compound
Obtained from by replacing two Cl with F Final Conclusion:
Option (E)