JEE Main levelSingle correct optionDifficulty 2 of 3hc174
Sodium 3-methylbutanoate, (CHX3)X2CH−CHX2−COONa, is heated with soda lime. The main organic product is:
A2-Methylpropane
BButane
C2-Methylbutane
DPropane
Answer: A
Decarboxylation replaces COONa by H: (CHX3)X2CH−CHX2−COONa(CHX3)X2CH−CHX3. This is 2-methylpropane (isobutane), with one carbon fewer than the acid.