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Threshold energy is always ....... than ...

Threshold energy is always ....... than activation energy.

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Threshold energy is equal to

Activation energy is:

What is activation energy.

A negative catalyst ......... the activation energy.

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The Threshold energy is given as E_(0) and radiation of energy E falls on metal then K.E is given as

The pyramid of energy is always

A colliison between reactant molecules must occur with a certain minimum energy before it is effective in yielding Product molecules. This minimum energy is called activation energy E_(a) Large the value of activation energy, smaller the value of rate constant k . Larger is the value of activation energy, greater is the effect of temperature rise on rate constant k . E_(f) = Activation energy of forward reaction E_(b) = Activation energy of backward reaction Delta H = E_(f) - E_(b) E_(f) = threshold energy For two reactions, activation energies are E_(a1) and E_(a2) , rate constant are k_(1) and k_(2) at the same temperature. If k_(1) gt k_(2) , then

ICSE-CHEMICAL KINETICS-EXERCISE (PART- I (OBJECTIVE QUESRTIONS)A.FILL IN THE BLANKS)
  1. In the equation k = A e^(-Ea//RT), the constant A is known as ...........

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  2. The unit of the rate of reaction is ............ and the unit of first...

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  3. In most reactions, the rate of reaction doubles or triples for ...... ...

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  4. A negative catalyst ......... the activation energy.

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  5. The order of a reaction rarely exceeds ...........

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  6. The order of reaction may ......... same as molecularity of the same r...

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  7. Threshold energy is always ....... than activation energy.

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  8. The rate of reaction ........ with increase in temperature.

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  9. The temperature coefficient of a reaction is the ratio of the rate con...

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  10. The second order reaction becomes first order if one of reactants is ....

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  11. Threshold energy minus the energy which the molecules actually possess...

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  12. The hydrolysis of ethyl acetate in ........ medium is...... order reac...

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  13. .......... of molecules containing more than activation energy is indi...

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  14. Which reaction order obeys the expression T(1//2) = 1/(K .A ) in chem...

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  15. A catalyst decreases .......... of a reaction.

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  16. For a relatively fast reaction, the rate constant is relatively………….an...

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  17. Reaction with low activation energy are ............ and the reactions...

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  18. Effective colliosions are those in which colloiding molecules must hav...

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  19. In the equation k = A e^(-Ea//RT), the constant A is known as ...........

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  20. The unit of the rate of reaction is ............ and the unit of first...

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