1.

Transition metals and their compounds are used as catalysts because (1) in the powder form, they have large surface area (2) of presence of free valence electrons (3) of presence of unpaired d-electrons (4) all of these

Answer» <p style="text-align: justify;"><span style="color:#000000"><span style="font-family:Arial,Helvetica,sans-serif"><strong>The Correct option is (4) all of these</strong></span></span></p>


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