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JEE Advanced2017Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

The correct statements about the oxoacids, HClO 4 and HClO are,

Options

  1. Athe conjugate base of HClO 4 is weaker base than HClO .
  2. Bthe central atom in both HClO 4 and HClO   is   sp 3 hybridized.
  3. CHClO 4 is formed in the reaction between   Cl 2   and   H 2 O .
  4. DHClO 4 is more acidic than HClO   because of the resonance stabilization of its anion.

Correct answer

A. the conjugate base of HClO 4 is weaker base than HClO .

Step-by-step solution

(i) HClO 4 ⇌ H + + ClO 4 - ClO 4 - is resonance stabilized anion. HClO ⇌ H + + ClO - ∴ HClO 4 is more acidic then HClO . (ii) Cl 2 + H 2 O → HClO + HCl (iii) HClO 4 The central atom is sp 3 hybridised. The central atom is sp 3 hybridised. (iv) HClO 4 + H 2 O → H 3 O ⊕ + ClO 4 - since H 2 O is accepting H + from HClO 4 so H 2 O is stronger base compare to ClO 4 - .

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