Question

Which of the following statements is/are correct about solid catalysts?

• A. Same reactants may give different products by using different catalysts.
• B. A catalyst does not change $\Delta H$ of a reaction.
• C. A catalyst is required in large quantities to catalyse the reaction.
• D. Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption.

Answer 1

Answer: (A), (B)

A catalyst does not change $\Delta H$ of a reaction.

Same reactants may give different products by using different catalysts as different catalysts have different specific functions to mould the reaction towards a specific product.

A Catalyst does not change the $△H$ of a reaction as $△H$ is the difference between the enthaply of reactants and products.

Catalysts are required in very small amounts to catalyse the reaction.

The catalytic activity of a solid catalyst depends upon the strength of chemisorption.

From the above statements, we can see that options $\left(a\right)$ and $\left(b\right)$ are correct.