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NEET2017ChemistryGeneral Organic ChemistryActual

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

Options

  1. AX>Z>Y
  2. BZ Y
  3. CX>Y>Z
  4. DZ>X>Y

Correct answer

A. X>Z>Y

Step-by-step solution

Carboxylic acid is stronger acid than - NH 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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