Arrange X , Y , and Z in order of increasing acidic strengths.

X > Z > Y

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Z < X > Y

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X > Y > Z

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Z > X > Y

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Solution

The correct option is C $X > Z > Y$
Carboxylic acid is stronger acid than $- + N H_{3}$ , therefore, X is the strongest acid. Since -COOH has $- I -$ effect which decreases with distance, therefore, $- I -$ effect is more pronounced on Z than on Y. As a result, Z is more acidic than Y.

Thus, overall order of decreasing acidic strength is $X > Z > Y$ .

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