Question

The catalyst is a substance which:

• A. increases the yield of the reaction
• B. increases the speed of the reaction
• C. decreases the speed of the reaction
• D. increases the speed of the reaction and remains unchanged.

Answer 1

The correct option is D increases the speed of the reaction and remains unchanged.

Catalyst is a substance that changes (usually increases) the rate of a reaction, without being involved in the reaction. A catalyst provides large surface area to one of the reactants, providing it an exposure to be reacted upon by the other reactant.