NEET 2003 Chemistry question

Not in JEE Main or NEET syllabus

Which one of the following characteristics of the transition metals is associated with their catalytic activity :

(1)High enthalpy of atomization
(2)Paramagnetic behaviour
(3)Colour of hydrated ions
(4)Variable oxidation statesCorrect

Answer: (4)

Solution

Transition metals and their compounds act as catalysts mainly because they can exhibit variable oxidation states; they form unstable intermediate compounds (by changing oxidation state, using the and electrons) and provide a new reaction path with lower

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Question ID VK-089215