A. Same as that of rate constant
B. Same as that of activation energy
C. Dimensionless
D. None of these
Related Mcqs:
- The units of frequency factor in Arrhenius equation_________________?
A. Are the same as those of the rate constant
B. Depend on the order of the reaction
C. Depend on temperature, pressure etc. of the reaction
D. Are cycles per unit time - Arrhenius equation shows the variation of ___________________ with temperature?
A. Reaction rate
B. Rate constant
C. Energy of activation
D. Frequency factor - Arrhenius equation represents graphically the variation between the ______________ and temperature?
A. Rate of reaction
B. Frequency factor
C. Rate constant
D. Activation energy - According to Arrhenius equation of temperature dependency of rate constant for an elementary reaction _________________?
A. k ∝ √T
B. k ∝ e-E/RT
C. k ∝ T e-E/RT
D. None of these - From Arrhenius law, a plot of loge K versus 1/T gives a straight line with a slope of (-E/R). The unit of E/R is___________________?
A. k cal
B. k cal/°K
C. °K
D. k cal. °K - With increase in temperature, the rate constant obeying Arrhenius equation____________________?
A. Increases
B. Decreases
C. Decreases exponentially
D. Can either increase or decrease; depends on the frequency factor - The temperature dependence of reaction rate constant (K) by Arrhenius law is given by_______________?
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 - Brunauer, Emmet and Teller (BET) equation is used to determine the specific surface area of a porous particle but not the pore volume & the porosity of the catalyst bed. Which of the following postulates is not used to derive BET equation ?
A. Langmuir’s assumption applies to every adsorbed layer
B. There is no dynamic equilibrium between successive layer
C. The adsorbed layer may be polymolecular in thickness and the heat of adsorption in each layer
(except the first one) is involved in each of the evaporation process
D. None of these - The reaction in which the rate equation corresponds to a stoichiometric equation, is called a/an _______________ reaction?
A. Elementary
B. Non-elementary
C. Parallel
D. Autokinetic
