1.

[A]:The catalyst increases the rate of reaction. [R]:The catalyst decreases the enthalpy change (DeltaH)

Answer»

Assertion [A] and reason [R] both are correct and [R] gives correct explanation of [A]
Assertion [A] and reason [R] both are correct but [R] does not give correct explanation of [A]
Assertion [A] is wrong but Reason [R] is wrong
Assertion [A] is wrong but Reason [R]is correct

Solution :In presence of catalyst the path of REACTION is change and LESS ACTIVATION energy is REQUIRED .
because of that the rate of reaction increase.
In presence of catalyst the energy of product or reactant does not change so,the ENTHALPY change for reaction remain constant and does not change.


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