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Statements : A catalyst doesnot alter th...

Statements : A catalyst doesnot alter the equilibrium constant os a reaction .
Expabnations : A catalyst complex with the reactants and provides an alternate path wirh a lower energy of activation for the reacton . The forwaord and forwad and reverse reactions are affected to the same extent .

A

If both (A) and (R) are true and (R) is the correct explanation of (A).

B

If both (A) and (R) are true but (R) is not the correct explanation of (A).

C

If (A) is correct but (R) is incorrect.

D

If (A) and (R) are both incorrect.

Text Solution

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The correct Answer is:
A
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The presence of _________ lowers the activation energy and provides an alternative path for the reaction.

Assertion(A): A catalyst speed up a reaction but does not participate in its mechanism. Reason(R): A catalyst provides an alternative path of lower activation energy to the reactants.

Knowledge Check

  • Assertion : A catalyst does no alter the equilibrium constant of a reaction. Reason : The catalyst forms a complex with the reactant and provides an alternate path with lowe energy of in activation for the reaction. The forward and reverse reaction are affected to the same extent.

    A
    if both assertion and reason are correct and reason is correct explanation for assertion.
    B
    if both assertion and reason are correct but reason is not correct explanation for assertion.
    C
    if assertion is correct but reason is incorrect.
    D
    if assertion and reason boht are incorrect.

  • Assertion : A catalyst lowers the threshold energy level for a reaction Reason : A catalyst combines with one of the reactans of from an intermediate the follows an alternate path with lesser energy of activation.

    A
    If both assertion and reason are correct and reason is correct explanation for assertion.
    B
    If both assertion and reason are correct but reason is not correct explanation for assertion.
    C
    If assertion is correct but reason is incorrect.
    D
    If assertion and reason both are incorrect.

  • Statements : A catalyst lowers the threshokd energy level for reaction . Explanations : Catalyst combines with reactabnt to form an exothermic intermediate and provide another parthway to traction .

    A
    S is correct but E is wrong .
    B
    S is worong but E is correct
    C
    Both S and E are correct and E is correct explanation of (S) .
    D
    Both S and E are correct but E is not correct explanation of S.

    • Similar Questions

    Explore conceptually related problems

    Read the given passage and answer the questions: According to Arrhenius equation, the lower the value of activation energy, faster will be the rate of reaction. A small amount of catalyst can catalyse a large amount of reagents. A catalyst does not alter Gibbs energy. DeltaG of a reaction. It catalyses the spontaneous reactions but does not catalyse non-spontaneous reactions. It is also found that a catalyst does not change the equilibrium constant of a reaction rather, it helps in attaining the equilibrium faster, that is, it catalyses the forward as well as the backward reactions to the same extent so that the equilibrium state remains same but it reached earlier. Q. Out of Gibb's energy and equilibrium constant, which quantity is changed by the catalyst?

    Statements : A catalyst enhances the rate of a reactgion . Expabnations : The energy foactivation of the reaction is lowered in presence of a catarge of the coagualnt ion.

    Statement: A catalyst always lower the energy of ectivation. Explanation: The catalyst-reactant interaction forms activated adsorbed complex and adsorption is always exothermic.

    Statement-1 : The catalyst does not affect the equilibrium constant. Statement-2 : Because for the catalysed reaction and uncatalysed reaction Delta H remains same and equilibrium constant depends on Delta H .

    Assertion(A): The pressence of a catalyst increases the speed of the forward and backward reactions to the same extent. Reason(R): Activation energy for both the forward and backward reactions is lowered to same extent.

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