Question

Which of the following statements is correct about solid catalysts?

• A. Catalyst is required in equal amount as the reactants present in the reaction.
• B. Catalytic activity of a solid catalyst does not depend upon the extent of chemisorption.
• C. Desorption is not important for a solid to act as good catalyst.
• D. Same reactants may give different products by using different catalysts.

Answer 1

The correct option is D Same reactants may give different products by using different catalysts.

Substances, which accelerate the rate of a chemical reaction and themselves remain chemically and quantitatively unchanged after the reaction, are known as catalysts, and the phenomenon is known as catalysis.

• For a given chemical reaction the amount of catalyst used is not necessarily to be equal to that of reactants.
• Catalytic activity of a solid catalyst depends upon the extent of chemisorption because of the various bonds formed.
• A catalyst is called a good catalyst if not only catalyses the reaction but also gives space for further reaction over its surface .i.e Desorption is a important characteristic.
• It is not necessary that a reaction to give same products if we use different catalysts, for different cataysts the products may be different.