A substance 'A' decomposes by a first order reaction starting initially with [A] = 2.00m and after 200 min, [A] becomes 0.15 m. For this reaction t1/2 is
53.49 min
50.49 min
48.45 min
46.45 min
The branch of chemistry which deals with the study of reaction rates and their mechanisms are called_______________
Thermodynamics
Chemical kinetics
Chemical equilibrium
Polymer science
The activation energy for a simple chemical reaction A → B is Eα in forward direction. The activation energy for reverse reaction is _______________
Can be lesser or more than Eα
Is always double of Eα
Is negative of Eα
Is always less than Eα
The rate constants k1 and k2 for two different reaction are 1016.e-2000/T and 1015.e-1000/T, respectively. The temperature at which k1 = k2 is__________________
1000 K
2000 K
For a first-order reaction, the half-life period is independent of
Initial concentration
Cube root of initial concentration
First power of final concentration
Square root of final concentration
The representation of rate of reaction in terms of concentration of the reactants is known as ______________
partial pressure
rate law
average rate
total rate
For the reaction
2 A + B → 3C + D
Which of the following does not express the reaction rate?
If the rate of reaction is equal to the rate of constant,then the order of reaction is_______________
2
3
0
1
If 60% of a first order reaction was completed in 60 mins, 50% of the same reaction would be completed approximately in ______________.
(log 4 = 0.60, log 5 = 0.69)
50 min
45 min
60 min
40 min
