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The temperature coefficient of a reactio...

The temperature coefficient of a reaction is

A

the rate constant at a fixed temperature

B

the ratio of rate constants at two temperatures

C

the ratio of rate constants at two different temperatures differing by `10^(@)C`

D

the ratio of rate constants at two pressures

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The correct Answer is:
C
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Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as k=Ae^(-E_(a)//RT) . For most of the reactions it was found that the temperature coefficient of the reaction lies between 2 to 3. The method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied by studying how much the rate of reaction changes in the presence of catalyst. In most of the cases, it is observed that catalyst lowers the activationenergy barrier and increases the rate of reaction. If the rate oc reaction grwos 15.6 times on increasing the temperature by 30 K the temperature coefficient of the reaction will be nearly

Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as k=Ae^(-E_(a)//RT) . For most of the reactions it was found that the temperature coefficient of the reaction lies between 2 to 3. The method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied by studying how much the rate of reaction changes in the presence of catalyst. In most of the cases, it is observed that catalyst lowers the activationenergy barrier and increases the rate of reaction. The pre-exponential factor in the Arrhenius equation of a second order reaction has the units

Arrhenius studied the effect of temperature on the rate of a reaction and postulated that rate constant varies with temperature exponentially as k=Ae^(-E_(a)//RT) . For most of the reactions it was found that the temperature coefficient of the reaction lies between 2 to 3. The method is generally used for finding the activation energy of a reaction. Keeping temperature constant, the effect of catalyst on the activation energy has also been studied by studying how much the rate of reaction changes in the presence of catalyst. In most of the cases, it is observed that catalyst lowers the activationenergy barrier and increases the rate of reaction. Which of the following plot will be linear?

The rate of a reaction increased from 2 units to 54 units due to change in temperature from 27^(@)C to 57^(@)C . What is the approximate temperature coefficient of the reaction.

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AAKASH SERIES-CHEMICAL KINETICS-OBJECTIVE EXERCISE - 1 (Rate and factors influencing rate)
  1. A catalyst accelerates the reaction, because

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  2. The unit of rate constant depends on

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  3. The temperature coefficient of a reaction is

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  4. If concentration of reactants is made x times the rate constant k beco...

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  5. The temperature coefficient of most of the reactions lies between

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  6. For a reaction(K((1+10)))/(K((1)))=x. When temperature is increased fr...

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  7. Increase of temperature will increase the reaction rate due to

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  8. The rate constants of a reaction at 300K and 280 K respectively are K(...

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  9. The rate constant K(1) of a reaction is found to be double that of ra...

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  10. The Arrhenius equation expressing the effect of temperature on the rat...

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  11. Activation energy depends on

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  12. A catalyst in a chemical reaction does not change

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  13. In general the rate of a given reaction can be increased by all the fa...

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  14. The effect of temperature on a reaction rate for whilch Ea is zero is ...

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  15. (A) The rate law of a reaction cannot be predicted from its balanced c...

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  16. In the graph drawn between log K and 1/T, intercept equalst o

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  17. In the Arrhenius equation equation,the Boltzmann factor e^(Ea//RT) rep...

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  18. Activation energies for different reactions are given below (a) A t...

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  19. Which of the following parameters of a chemical readtion are increased...

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  20. For an exothermic chemical process occurring in two steps as i) A+Bt...

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