Question

Arrange X, Y and Z in 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 

Explanation:

Carboxylic acid is stronger acid than  therefore, X is the strongest acid. Since -COOH has -I-effect which decreases with distance, therefore, -I-effect is more pronounced on Z that on Y. As a result, Z is more acidic than Y. Thus, overall order of decreasing acidic strength is X > Z > Y.