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JEE MainChemistryd and f Block Elements

Consider the following statements regarding the stability of oxidation states and oxidizing power of oxides: A. In d-block elements, the stability of the highest oxidation state increases down a group. B. CrO ₃ is a stronger oxidizing agent than WO ₃ . C. In p-block elements, the stability of the highest oxidation state increases down a group. D. PbO ₂ is a stronger oxidizing agent than SnO ₂ . Choose the correct sta

Options

  1. AA, B, C and D
  2. BA and B only
  3. CC and D only
  4. DA, B and D only

Correct answer

D. A, B and D only

Step-by-step solution

Statement A is correct: In the d-block, the stability of higher oxidation states increases down the group (e.g., 5 d > 4 d > 3 d ). Statement B is correct: Since W ( VI ) is more stable than Cr ( VI ) , CrO ₃ has a greater tendency to get reduced to a lower oxidation state (like Cr ⁺³ ) compared to WO ₃ . Thus, CrO ₃ is a stronger oxidizing agent. Statement C is incorrect: In the p-block, the stability of the highest oxidation state decreases down the group due to the inert pair effect. The lower oxidation state be

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