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NEET levelSingle correct optionDifficulty 1 of 3sc056

A catalyst increases the rate of a chemical reaction mainly because it

Aprovides an alternative pathway with lower activation energy
Bincreases the average kinetic energy of the reactant molecules
Cincreases the enthalpy change of the reaction
Dincreases the equilibrium constant of the reaction

Answer: A

A catalyst offers a new mechanism with a lower activation energy, so a larger fraction of collisions is effective. It does not change the temperature,

Δ H

or

K

.

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