On increasing the temperature the rate of the reaction increases because of [MP PMT 1997]

Increase in the number of effective collisions

Decrease in the number of collisions

Decrease in the energy of activation

Decrease in the number of activated molecules

According to the adsorption theory of catalysis the speed of the reaction increases because [CBSE PMT 2003]

Adsorption lowers the activation energy of the reaction

The concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption

In the process of adsorption the activation energy of the molecules becomes large

Adsorption produces heat which increases the speed of the reaction

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