Question

The catalytic activity of the transition metals and their compounds is described to:

• A. their chemical reactivity
• B. their ability to adopt multiple oxidation states and their non complexing ability
  
• C. their unfilled d-orbital
• D. their ability to adopt multiple oxidation states and their complexing ability

Answer 1

The correct option is D their ability to adopt multiple oxidation states and their complexing ability

Transition elements exhibit variable valency to form intermediate compounds. Hence they act as a good catalyst. The catalytic activity of the transition metals and their compounds is described to their ability to adopt multiple oxidation states and their complexing ability.