Which of the following statements are correct about solid catalyst?...

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Which of the following statements are correct about solid catalyst?
(i) Same reactants may give different product by using different catalysts.
\( \mathrm{P} \)
(ii) Catalyst does not change \( \Delta H \) of reaction.
(iii) Catalyst is required in large quantities to catalyse reactions.
W
(iv) Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption.
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