Question

2-Methyl propane can be prepared by Wurtz reaction. The haloalkanes taken along with metallic sodium and dry ether are:

• A. chloromethane and 2-chloropropane
• B. chloroethane and chloromethane
• C. chloroethane and 1-chloropropane
• D. chloromethane and 1-chloropropane

Answer 1

The Correct Option is A

1. The Wurtz reaction is a coupling reaction in which haloalkanes react with sodium metal in dry ether to form alkanes. In this case, the reaction would involve the coupling of two alkyl groups.
2. To prepare 2-methylpropane (isobutane) via the Wurtz reaction, we need to use chloromethane (CH₃Cl) and 2-chloropropane (C₃H₇Cl) as the haloalkanes.

Chloromethane (CH₃Cl) provides a methyl group (CH₃), and 2-chloropropane (C₃H₇Cl) provides a propyl group (C₃H₇).

These two can undergo the Wurtz reaction to couple and form 2-methylpropane (isobutane).

Thus, the correct answer is (A) chloromethane and 2-chloropropane.