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NEET2014Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Acidity of diprotic acids in aqueous solutions increases in the order:

Options

  1. AH 2 S < H 2 S e < H 2 T e
  2. BH 2 S e < H 2 S < H 2 T e
  3. CH 2 T e < H 2 S < H 2 S e
  4. DH 2 S e < H 2 T e < H 2 S

Correct answer

A. H 2 S < H 2 S e < H 2 T e

Step-by-step solution

Acidic strength for a particular group is inversely proportional to the bond energy and directly proportional to the bond length. H 2 O &#60; H 2 S &#60; H 2 S e &#60; H 2 T e (acidic strength)

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