| Assertion : A reaction cannot become fast by itself unless a catalyst is added. |
| Reason : A catalyst always increases the speed of a reaction. |
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: D
Solution :
Both assertion and reason are false. There are reactions in which one of the products acts as catalyst (autocatalysis) and no catalyst is added.
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