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Q.

Correct statement regarding catalytic activity is

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a

Reactant molecules must be very strongly chemically adsorbed on catalytic surface

b

Catalyst is of little use in the reaction with very low equilibrium constant value

c

Group 5 -11 elements cannot be used as catalysts in Hydrogenation reactions

d

Catalyst can initiate a chemical reaction

answer is B.

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Detailed Solution

(1)Reactant molecules must be  chemically adsorbed to an extent where desorption of product must occur  but chemisorption must not be very strong so that desorption cannot occur;
(3) 5-11 group elements (especially 7,8,9) are used as  catalysts in Hydrogenation reactions
(4) Catalyst can never initiate a reaction

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