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NEET2004Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Assertion : HClO ₄ is a stronger acid than HClO ₃ . Reason : Oxidation state of Cl in HClO ₄ is +8 and in HClO ₃+5 .

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion

Step-by-step solution

Greater the number of negative atoms present in the oxy-acid make the acid stronger. In general, the strengths of acids that have general formula, ( HO )_m ZO _n can be related to the value of n . As the value of n increases, acidic character also increases. The negative atoms draw electrons away from the Z-atom and make it more positive. The Zatom, therefore, becomes more effective in withdrawing electron density away from the oxygen atom that bonded to hydrogen. In turn, the electrons of H - O bond are drawn more

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