MEDIUM
Earn 100
It is true that :
(1) A zero order reaction is a single step reaction.
(2) A second order reaction is always a multistep reaction.
(3) A first order reaction is always a single step reaction.
(4) A zero order reaction is a multistep reaction.
50% studentsanswered this correctly
Important Questions on Chemical Kinetics
MEDIUM
Decomposition of follows a first order reaction. In fifty minutes the concentration of decreases from to in one such decomposition. When the concentration of reaches , the rate of formation of will be:
EASY
A first-order reaction has a specific reaction rate How much time will it take for the reactant to reduce to ?
MEDIUM
The rate constant for the first order reaction is How much time will it take to reduce the concentration of the reactant to value?
MEDIUM
The rate of a first-order reaction is at second and at seconds after initiation of the reaction. The half-life period of the reaction is:
EASY
If 50 % of a reaction occurs in 100 second and 75 % of the reaction occurs in 200 second, the order of this reaction is:
MEDIUM
During the nuclear explosion, one of the products is with half life of years. If of was absorbed in the bones of a newly born baby in place of how much time, in years, is required to reduce it by if it is not lost metabolically ____________.
HARD
The half-life period of a first-order reaction is . The amount of substance left after one hour will be
EASY
It takes for a first order reaction to go to completion. The total time required for the same reaction to reach completion will be
EASY
The rate constant for a first order reaction is If initial concentration of the reactant is , what is the half-life of the reaction?
MEDIUM
The given plots represent the variation of the concentration of a reactant with time for two different reactions . The respective orders of the reaction are
(i) 
(ii) 
HARD
The reaction follows first order kinetics. The pressure of a vessel containing only was found to increase from 50 mm Hg to 87.5 mm Hg in 30 min. The pressure exerted by the gases after 60 min. Will be (Assume temperature remains constant) :
MEDIUM
If the rate constant for a first order reaction is , the time required for the completion of of the reaction is given by
EASY
Decomposition of exhibits a rate constant of . How many years are required for the decomposition of of into ?
HARD
The decomposition reaction is started in a closed cylinder under the isothermal isochoric condition at an initial pressure of . After , the pressure inside the cylinder is found to be . If the rate constant of the reaction is , assuming ideal gas behaviour, the value of is(nearest integer)
MEDIUM
A flask contains a mixture of compounds and . Both compounds decompose by first-order kinetics. The half-lives for and are and , respectively. If the concentrations of and are equal initially, the time required for the concentration of A to be four times that of (in s) is :
MEDIUM
If of a first order reaction was completed in minutes, of the same reaction would be completed in approximately (in minutes) _____
(Take: )
MEDIUM
For a zero - order reaction with rate constant k, the slope of the plot reactant concentration against time is
EASY
When initial concentration of a reactant is doubled in a reaction, its half-life period is not affected. The order of the reaction is:
EASY
The rate constant of the reaction is mole per liter per second. If the initial concentration of A is 5 M, then the concentration of B after 20 minutes is:
