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NEET2012Chemistryd and f Block ElementsActual

The catalytic activity of transition metals and their compounds is ascribed mainly to

Options

  1. Atheir magnetic behaviour
  2. Btheir unfilled d -orbitals
  3. Ctheir ability to adopt variable oxidation states
  4. Dtheir chemical reactivity

Correct answer

C. their ability to adopt variable oxidation states

Step-by-step solution

Transition metals show variable oxidation states, due to which they can perform as catalyst. aligned & e.g., 2 SO ₂+ O ₂ (catalyst) V ₂ O ₅ 2 SO ₃ & SO ₂+ +5 ~V ₂ O ₅ SO ₃+ +4 ~V ₂ O ₄ & +4 ~V ₂ O ₄+ O ₂ +5 ~V ~V ₅ & aligned

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