WorksheetsChemical Kinetics
Total questions: 15
Worksheet time: 10mins
1. What will be the fraction of molecules having energy equal to or greater than activation energy, Ea?
K
A
Ae-Ea/Rt
e-Ea/Rt
What type of reaction is this?
Second order
Unimolecular
Pseudo-unimolecular
Third order
Which among the following is a false statement?
Rate of zero order reaction is independent of initial concentration of reactant.
Half life of a third order reaction is inversely proportional to square of initial concentration of the reactant.
Molecularity of a reaction may be zero or fraction.
For a first order reaction, t1/2=0.693K
Which of the following statements about the catalyst is true?
A catalyst accelerates the rate of reaction by bringing down the activation energy.
A catalyst does not participate in reaction mechanism.
A catalyst makes the reaction feasible by making ∆G more negative.
A catalyst makes equilibrium constant more favorable for forward reaction.
An endothermic reaction with high activation energy for the forward reaction is given by the diagram.
A
B
C
D
For a chemical reaction A→B, it is found that the rate of reaction doubles when the concentration of A is increased four times. The order of reaction is
Two
One
Half
Zero
The half life of the first order reaction having rate constant K = 1.7 x 10-5s-1 is
12.1 h
9.7 h
11.3 h
1.8 h
when the rate of the reaction is equal to the rate constant, the order of the reaction is
zero order
first order
second order
third order
A catalyst alters, which of the following in a chemical reaction?
Entropy
Enthalpy
Internal energy
Activation energy
If the rate of a reaction is expressed by, rate = A [A]² [B], the order of reaction will be
2
3
1
0
The rate constant of a reaction depends upon
temperature of the reaction
extent of the reaction
initial concentration of the reactants
the time of completion of reaction
The number of molecules of the reactants taking part in a single step of the reaction is indicative of
order of a reaction
molecularity of a reaction
fast step of the mechanism of a reaction
half-life of the reaction
The overall rate of a reaction is governed by
the rate of fastest intermediate step
the sum total of the rates of all intermediate steps
the average of the rates of all the intermediate steps
the rate of slowest intermediate step
In pseudo unimolecular reactions
both the reactants are present in low concentration
both the reactants are present in same concentration
one of the reactant is present in excess
one of the reactant is non-reactive
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