Wurtz reaction of bromoethane gives (n )-butane. Sodium salt of (X ) on heating with sodalime also results in (n )-butane. Compound (X ) is

Step-by-step solution

In Wurtz reaction, two molecules of bromoethane react with 2 molecules of sodium to form (n )-butane. ( aligned CH ₃- CH ₂- Br +2 Na + Br - CH ₂- CH ₃ -2 NaBr CH ₃- CH ₂- CH ₂- CH ₃ aligned ) (n )-butane can also be obtain when sodium salt of pentanoic acid ((X) ) gets heated with sodalime. The reaction is given as under : ( (X) CH ₃ ( CH ₂ )₃ COOH NaOH ) ( Sodium salt CH ₃ CH ₂ CH ₂ CH ₂ COONa NaOH + CaO (Sodalime) n-butane CH ₃ CH ₂ CH ₂ CH ₃ + Na ₂ CO ₃ ) Hence, (X ) is ( CH ₃ CH ₂ CH ₂ CH ₂ COOH ).