Page 1 - Home Assignments

1. Define – Rate of reaction?
2. What are the units of rate of a reaction.

3.For the reaction R → P, the concentration of a reactant changes from 0.03M
to 0.02M in 25 minutes. Calculate the average rate of reaction using units
of time both in minutes and seconds.
4.In a reaction, 2A → Products, the concentration of A decreases from 0.5
mol L–1 to 0.4 mol L–1 in 10 minutes. Calculate the rate during this interval?

5.What is average rate of a reaction? How is it determined?

6.What is instantaneous rate of a reaction? How is it determined?

7.Identify the reaction order from each of the following rate constants.
–1 –1
–5
(i) k = 2.3 × 10 L mol s
–4 –1
(ii) k = 3 × 10 s

8.For a reaction, A + B → Product; the rate law is given by, r = k [ A]1/2 [B]2.
What is the order of the reaction?
9.The conversion of molecules X to Y follows second order kinetics. If
concentration of X is increased to three times how will it affect the rate of
formation of Y ?
10.For the reaction Cl (g) 2NO(g) 2  2NOCl(g), the rate law is expressed as rate

 K[Cl ][NO] . What is the overall order of this reaction?
2
2
11.When is the rate of reaction equal to specific reaction rate?
st
12.Give an example of pseudo 1 order reaction.
13.The reaction A B  C has zero order. What is the rate equation?
14.The rate constant of a reaction is 2 10 Lmol sec  2  1  1 . What is the order of the reaction?

15.Enlist the factors affecting rate of a reaction?
16. What do you understand by rate law expression?

17.A reaction is 50% complete in 2 hours and 75% complete in 4 hours. What is the order of
reaction?
st
18.Give an example of pseudo 1 order reaction.
19.State any one condition under which a bimolecular reaction may be kinetically first order.
20.A substance with initial concentration ‘a’ follows zero order kinetic with the rate constant

 1  1
KmolL s . In how much time will the reaction go to completion?
21.Express the relation between the half life period of a reactant and its initial concentration
for
a reaction of nth order.

22.The rate of reaction x  becomes 8 times , when the concentration of the reactant x is
y