Question

Arrange in the order of increasing acidic strengths.

• A. X > Z > Y
• B. Z < X > Y
• C. X > Y > Z
• D. Z > X > Y

Answer 1

The correct option is A

X > Z > Y

Carboxylic acids are stronger acid than $\stackrel{\oplus }{N{H}_3}$ in amino acid and $-\stackrel{\oplus }{N{H}_3}\left(Y\right)$. (Z) is more acidic than (Y) due to - I effect of (- COOH) group which is nearer to (Z) than (Y). Hence, the acidic order: X > Z > Y.