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Energy required for start of a chemical ...

Energy required for start of a chemical reaction is

A

Activation energy

B

Entropy

C

Potential energy

D

Kinetic energy.

Text Solution

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The correct Answer is:
A
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Which of the following statements about enzymes are correct ? (i) Enzymes do not alter the overall change in free energy for a reaction. (ii) Enzymes are proteins whose three dimensional energy. (iii) Enzymes speed up reactions by lowering activation energy. (iv) Enzymes are highly specific for reactions. (v) The energy input needed to start a chemical reaction is called activation energy.

Give the term for the energy required to initiate a biochemical reaction.

Knowledge Check

  • According to the collision theory, only the effective collisions among the reacting species result in the products. In order that the collisions may be effective, the reacting species must have energy equal to or more than a certain minimum energy called threshold energy (E^(@)) . Extra energy which has be supplied to the reactants to make collisions effective is known as activation energy (E_(a)) . This is related to reaction rate with the help of Arrhenius equation, k=Ae^(-Ea//RT) The equation also helps in calculating the activation energy for a reaction at a specific temperature. In general, the rate of reaction is inversely proportional to the activation energy required. The chemical reactions in which the reactants require high amount of activation energy are generally.

    A
    slow
    B
    fast
    C
    instaneous
    D
    spontaneous

  • The minimum energy required for molecules to enter into chemical reaction is called

    A
    kinetic energy
    B
    potential energy
    C
    threshold energy
    D
    activation energy.

  • The minimum energy required for molecules to enter into chemical reaction is called

    A
    Kinetic energy
    B
    Potential energy
    C
    Heat energy
    D
    Activation energy

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    The minimum energy required for molecules to enter into chemical reaction is called

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    In which cell the free energy of a chemical reaction is directly converted into electricity ?

    In which cell the free energy of a chemical reaction is directly convertd into electricity

    A : In presence of +ve catalyst, activation energy & threshold energy decreases. R : Minimum energy required to permit a reaction is known as threshold energy.

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