The reaction A → B follows first order kinetics. The time taken for 0.8 mole of A to produce 0.6 mole of B is 1 h. What is the time taken for the conversion of 0.9 mole of A to 0.675 mole of B?
0.25 h
2 h
1 h
0.5 h
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?
For exothermic reaction, the energy of activation of the reactants is
Equal to the energy of activation of products
Less than the energy of activation of products.
Greater than the energy of activation of products.
Sometimes greater and sometimes less than that of the products.
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
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
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
For a first order reaction A → B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 × 10-5 mol L-1s-1. The half-life period of the reaction is
220 s
30 s
300 s
347 s
The rate of first order reaction is 1.5 × 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
23.1 min
8.73 min
7.53 min
In a first order reaction A → B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then half-life is______________
