Consider two reactions having same Arrhenius factor A, but different energy of activation.
(i) `A rarr B , Ea_(1)=20kJ`
(ii) `Crarr D, Ea_(2)=30kJ`
Both are at temperature `25^(@)C` It temperature in both reaction is increased slightly in such a way that change in temperature in both case is same than choose the correct options.

Two first order reactions have same frequency factor but different activation energies. At a certain temperature, the rate constant of which reaction is more?

For two reactions (i) P rarr Product and (ii) Q rarr Product, the order of reaction (i) is 1 while that of reaction (ii) is 2 . At 347 K , the energy of activation of reaction (i) is 55 kJ mol^(-1) but whenever this reaction is carried out in the presence of catalyst at the same temperature, the energy of activation is 53 kJ mol^(-1) . Moreover, for reaction (ii), when the temperature is increased form 298 K to 308 K , the rate of reaction increases as many times as for reaction (i) in the presnece of catalyst. Calculate the rate constant of reaction (ii) at 318 K , if the pre-exponential factor for reaction (ii) is 3.56 xx 10^(9) mol^(-1) L s^(-1) . Note: Arrhenius equation does not depend on the order of reaction.

In the Arrhenius equation for a certain reaction, the value of A (frequency factor) and E_a (activation energy) are 4 xx 10^(13)" s"^(-1) and 98.6" kJ mol"^(-1) , respectively. If the reaction is of first order, then find that at what temperature will its half-life period be 10 min?

The rate of reaction ((dx)/(dt)) varies with nature, physical state and concentration of reactants, temperature, exposure to light and catalyst, whereas rate constant (K) varies with temperature and catalyst only. The rate constant K is given as K=Ae^(-E_(a)//RT) where A is Arrhenius parameter or pre-exponential factor and E_(a) is energy of activation. The minimum energy required for a reaction is called threshold energy and the additional energy required by reactant molecules to attain threshold energy level is called energy of activation. The temperature coefficient of reaction I is 2 and reaction II is 3 . Both have same speed at 25^(@)C and show I order kinetics. The rati of rates of reaction of these two at 75^(@)C is:

The given graph depicts the effect of temperature on the activity of the two enzymes A and B that catalyze the same reaction. Select the correct statement (s) for these results A. The rate of reaction in each case increases with increase in temperature and declines at higher temperatures due to denaturation of the enzyme B. Both the enzymes A and B are thermolabile C. At higher temperature the reactants become highly energized and fail to interact with active site, thus decreasing the rate of reaction D. The enzyme A is from a mesophilic organism, whereas the enzyme B is from a thermophilic organism