Question

The rate of a chemical reaction normally _____. decreases as temperature increases /is slowed down by a catalyst/ increases as reactant concentration increases/ decreases as reactant concentration increases

Answer 1

Answer: Option (c) is the correct answer.

Explanation:

Rate of a chemical reaction is defined as the speed of a reaction at which it occurs.

When we increase the temperature of a chemical reaction then there occurs more number of collisions between the molecules as kinetic energy of molecules increases.

Whereas, when concentration of reactant molecules increases then also there  occurs more number of collisions due to which rate of chemical reaction increases.

Also, when we add catalyst in a chemical reaction then there will be decrease in activation energy and an increases in chemical reaction.

Therefore, we can conclude that the rate of a chemical reaction normally increases as reactant concentration increases.

Answer 2

The rate of a chemical reaction normally... increases as the reactant concentration increases.

-- this is because as the reactant concentration increases, it increases the propensity for successful collision to take place thus increasing the likelihood of products being produced faster.