Substitution and addition reactions — task. Chemistry CBSE Live product, Class 10.

Choose the correct answer for the following:

1. What role do catalysts play in a reaction?

They slow down the reaction rate
They prevent the reaction from occurring
They enhance the reaction rate without being consumed
They react with the substrate to form a new product

2. What catalyst is commonly used in the hydrogenation process?

Copper
Zinc
Nickel
Iron

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