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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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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.

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 .

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.

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.

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 .

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.
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