The catalytic activity of transition metals and their compounds is ascribed mainly to : [AIPMT (...

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The catalytic activity of transition metals and their compounds is ascribed mainly to :
[AIPMT (Mains) 2012]
\( P \)
(a) their ability to adopt variable oxidation states
(b) their chemical reactivity
(c) their magnetic behaviour
(d) their unfilled \( d \)-orbitals
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