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In a reaction, the threshold energy is e...

In a reaction, the threshold energy is equal to

A

Activation energy `+` normal energy of reactants

B

Activation energy `-` normal energy of reactants

C

Activation energy

D

Normal energy of reactants

Text Solution

Verified by Experts

The correct Answer is:
A
Activation energy is the energy needed by reactant molecules to gain threshold energy level.
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Knowledge Check

  • For a reaction, the threshold energy is equal to

    A
    Activation energy + initial potential energy of reactants
    B
    Activation energy - norinal initial potential energy of reactants
    C
    Activation energy
    D
    Normal energy of reactants.

  • For a certain reaction a large fraction of molecules has energy more than the threshold energy, still the rate of reaction is very slow. The possible reason for this could be that

    A
    the colliding molecules could be large in size
    B
    the colliding molecules must not be properly oriented for effective collisions
    C
    the rate of reaction could be independent of the energy
    D
    one of the reactant cound be in excess.

  • 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.
    • A2Z-CHEMICAL KINETICS-Parallel Reaction, Consecutive Reaction, Special Cases Of First-Order Reactions
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