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With increase in temperature , rate of r...

With increase in temperature , rate of reaction

A

increases

B

decreases

C

remains same

D

may increase

Text Solution

Verified by Experts

The correct Answer is:
A
With increase in temperature rate of reaction , increase due to increase in number of molecules having threshold energy.
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It is generalized that a 10^(@)C increases in temperature casues the rate of reaction to double. Applied to a reaction at 295 K , what is the value of E_(a) ?

The rate of reaction increases isgnificantly with increase in temperature. Generally, rate of reactions are doubled for every 10^(@)C rise in temperature. Temperature coefficient gives us an idea about the change in the rate of a reaction for every 10^(@)C change in temperature. "Temperature coefficient" (mu) = ("Rate constant of" (T + 10)^(@)C)/("Rate constant at" T^(@)C) Arrhenius gave an equation which describes aret constant k as a function of temperature k = Ae^(-E_(a)//RT) where k is the rate constant, A is the frequency factor or pre-exponential factor, E_(a) is the activation energy, T is the temperature in kelvin, R is the universal gas constant. Equation when expressed in logarithmic form becomes log k = log A - (E_(a))/(2.303 RT) Activation energies of two reaction are E_(a) and E_(a)' with E_(a) gt E'_(a) . If the temperature of the reacting systems is increased form T_(1) to T_(2) ( k' is rate constant at higher temperature).

The rate for the reaction: RCl+NaOH(aq)rarr ROH+NaCl is given by rate = k_(1)[RCl] The rate of the reaction is: (A) Doubled on doubling the concentration of "NaOH (B) Halved on reducing the concentration of "RCl" to half (C) Decreased on increasing the temperature of reaction (D) Unaffected by increasing the temperature of the reaction

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-CHEMICAL KINETICS -Exercise 1
  1. Which of these does not influence the rate of reaction?

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  2. Units of rate constant of first and zero order reactions in terms of m...

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  3. With increase in temperature , rate of reaction

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  4. 2N(2)O(5)(g)to4NO(2)+O(2)(g) What is the ratio of the rate of decomp...

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  5. Order of a chemical reaction is define as the

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  6. Which one of the following statements for the order of a reaction is i...

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  7. The order of a reaction with rate equal to KC(A)^(3//2)C(B)^(-1//2) is

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  8. The unit "mol L"^(-1)s^(-1) is meant for the rate constant of the reac...

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  9. The relative order of rate of esterification of acids is

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  10. Decomposition of ammonium nitrite is an examle of

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  11. When one reactant is present in excess in a chemical reaction between ...

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  12. Foe the rate law, =K[A]^(3//2)[B]^(-1) the overall order of a reaction...

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  13. For a zero order reaction a graph of conc. (along Y axis) and time (al...

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  14. For a chemical reaction ……. Can never be a fraction

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  15. The rate of law for the reaction xA+yB=mP+nQ is Rate k[A]^(c)[B]^(d). ...

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  16. For which type of the reactions, order and molecularity have the sa...

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  17. Zero order reaction means that

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  18. Value of t(1//2) for first order reaction is

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  19. In a first ordr reaction, reactant concentration 'C' varies with time ...

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  20. Which of the following statement (s) is//are true?

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