In the following reaction, how is the rate of appearance of the underlined product related to the rate of disappearance of the underlined reactant?
If 60% of a first order reaction was completed in 60 min,50% of the same reaction would be completed in approximately.
50 min
45 min
60 min
40 min
The experimental data for the reaction
The activation energy for a simple chemical reaction is Ea in forward direction. The activation energy for reverse reaction.
Can be less than or more than Ea.
Is always double of Ea.
Is negative of Ea.
Is always less than Ea.
For exothermic reaction, the energy of activation is.
Equal to the energy of activation of products.
Less than the energy of activation of product.
Greater than the energy of activation of products.
sometimes greater and sometimes less than that of the products.
The rate constant k1 and k2 for two different reactions are 1016.e-2000/T and 1015.e-1000/T, respectively. The temperature at which k1 =k2 is
1000 k
2000 k
The rate of first order reaction is 1.5 x 10-2 mol L-1 min-1 at 0.5 M concentration of the reactant. The half-life of the reaction is.
0.383 min
23.1min
8.73 min
7.53 min
3 x 10-4 mol L1s1
4 x 10-4 mol L1s1
6 x 10-4 mol L1s1
1 x 10-4 mol L1s1
Activation energy of a chemical reaction can be determined by.
Evaluating rate constant at standard temperature.
Evaluating velocities of reaction at two different temperatures.
Evaluating rate constants at two different temperatures.
Changing concentration of reactants.
