1.

Assertion(A): A reaction cannot become fast by itself unless a catalyst is added.

Answer»

If both (A) and (R) are correct, and (R) is the correct explanation of (A)
If both (A) and (R) are correct, but (R) is the correct explanation of (A).
If (A) is correct, but (R) is INCORRECT.
If (A) is incorrect, but (R) is correct. S

Solution :CATALYST always does not INCREASES the speed of reaction.


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