Carboxylic Acids and their Derivatives 1 Question 10

11. When propionic acid is treated with aqueous sodium bicarbonate, $\mathrm{CO}{2}isliberated.The\mathrm{C}of\mathrm{CO}{2}$ comes from

(a) methyl group

(1999,2M)

(b) carboxylic acid group

(c) methylene group

(d) bicarbonate group

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Solution:

  1. $\mathrm{CH}{3}-\mathrm{CH}{2}-\mathrm{COOH}+\mathrm{NaH} \stackrel{}{\mathrm{C}} \mathrm{O}{3} \longrightarrow \mathrm{CH}{3} \mathrm{CH}{2} \mathrm{COONa}+\mathrm{H}{2} \mathrm{O}+\stackrel{}{\mathrm{C}} \mathrm{O}_{2}$