A. k ∝ e-E/RT
B. k ∝ T.eE/RT
C. k ∝ √T
D. k ∝ T1.5
Related Mcqs:
- The rate constant of a chemical reaction increases by 100 times when the temperature is increased from 400 °K to 500 °K. Assuming transition state theory is valid, the value of „E/R’ is __________________?
A. 8987°K
B. 9210°K
C. 8764°K
D. 8621°K - Transition state theory gives the rate constant as__________________?
A. K α e-E/RT
B. K α eE/RT
C. K α T . e-E/RT
D. K α √T . e-E/RT - At a given value of E/R (ratio of activation energy and gas constant), the ratio of the rate constants at 500°K and 400°K is 2, if Arrhenius law is used. What will be this ratio, if transition state theory is used with the same value of „E/R‟ ?
A. 1.6
B. 2
C. 2.24
D. 2.5 - Collision theory gives the rate constant for bimolecular reaction as___________________?
A. K α √T.e-E/RT
B. K α eE/RT
C. K α e-E/RT
D. None of these - An irreversible aqueous phase reaction, A + B → P, is carried out in an adiabatic mixed flow reactor. A feed containing 4kmole/m3 of each A and B enters the reactor at 8m3 /hr. If the temperature of the exit stream is never to exceed 390 K, what is the maximum inlet feed temperature allowed? Data: Heat of reaction = – 50 kJ/mole Density of the reacting mixture = 1000kg/m3 Specific heat of reacting mixture = 2kJ/kg.K The above data can be assumed to be independent of temperature and composition?
A. 190
B. 290
C. 390
D. 490 - In a chemical reaction as shown in the bellow figure, it is observed that the (i) Rate of formation of ‘P’ is doubled on doubling the concentration of ‘X’ (ii) Rate of formation of ‘P’ is quadrupled on doubling the concentration of ‘Y’ (iii) Doubling the concentration of ‘Z’ does not affect the rate of formation of ‘P’ What is the order of the above chemical reaction ?
A. Zeroth order
B. First order
C. Second order
D. Third order - Second order consecutive irreversible reaction as shown in the bellow figure, were carried out in a constant volume isothermal batch reactor with different initial feed compositions. Reactor temperature was same in all the cases. In experiments where the ratio of concentration of B to that of A in the initial feed was less than 0.5, the concentration of B increased first, reached a maximum and then declined with time. However, for all experiments where this concentration ratio was 0.5 or above, concentration of B decreased monotonically with time right from the beginning. What is the ratio of the two rate constants (k1/k2) ?
A. 1/4
B. 1/2
C. 2
D. 4 - Which of the following is not a theory of homogeneous reaction ?
A. Collision theory and activated complex theory
B. Chain reaction theory
C. Radiation hypothesis
D. None of these - Rate constant ‘k’ and absolute temperature ‘T’ are related by collision theory (for bimolecular) as______________________?
A. k ∝ T1.5
B. k ∝ exp(-E/RT)
C. k ∝ √T
D. k ∝ T - From collision theory, the reaction rate constant is proportional to_________________?
A. exp (-E/RT)
B. exp (-E/2RT)
C. √T
D. Tm exp (-E/RT)
