: A catalyst increases the rate of a reaction.
: In presence of a catalyst, the activation energy of the reaction decreases.
- If both Assertion: and Reason: are true and the Reason: is the correct explanation of the Assertion
- If both Assertion: and Reason: are true but the Reason: is not the correct explanation of the Assertion
- If Assertion: is true but Reason: is false
- If both Assertion: and Reason: are false
The Correct Option is D
Solution and Explanation
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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
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Reason (R) : Liberation of oxygen is due to photolysis of water.
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- Transcription
Concepts Used:
Rate of a Chemical Reaction
The rate of a chemical reaction is defined as the change in concentration of any one of the reactants or products per unit time.
Consider the reaction A → B,
Rate of the reaction is given by,
Rate = −d[A]/ dt=+d[B]/ dt
Where, [A] → concentration of reactant A
[B] → concentration of product B
(-) A negative sign indicates a decrease in the concentration of A with time.
(+) A positive sign indicates an increase in the concentration of B with time.
Factors Determining the Rate of a Reaction:
There are certain factors that determine the rate of a reaction:
- Temperature
- Catalyst
- Reactant Concentration
- Chemical nature of Reactant
- Reactant Subdivision rate