Chemical Kinetics Test

Result

Chemical Kinetics Test - 26

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Weekly Quiz Competition

Question 1
4 / -1

Activation energy of a chemical reaction can be determined by

A
evaluating rate constant at standard temperature

B
evaluating velocities of reaction at two different temperatures

C
evaluating rate constants at two different temperatures

D
changing concentration of reactants
Question 2
4 / -1

For the reaction A → B, the rate law expression is: rate = k [A]. Which of the following statements is incorrect?

A
The reaction follows first order kinetics

B
The t_1/2 of reaction depends on initial concentration of reactants

C
K is constant for the reaction at a constant temperature

D
The rate law provides a simple way of predicting the conc. of reactants and products at any time after the start of the reaction.
Question 3
4 / -1

For a first order reaction, the plot of log k against 1/T is a straight line. The slope of the line is equal to

A

B

C

D

Solution
Question 4
4 / -1

A

B

C

D

Solution
Question 5
4 / -1

Units of rate constant for first and zero order reactions in terms of molarity M and time in seconds are respectively

A
sec^–1, M sec^–1

B
sec^–1, M

C
M sec^–1, sec^–1

D
M, sec^–1
Question 6
4 / -1

Half-life of a reaction is found to be inversely proportional to the cube of initial concentration. The order of reaction is

A
4

B
3

C
5

D
2

Solution
Question 7
4 / -1

Consider the chemical reaction, N₂(g) + 3H₂(g) → 2NH₃ The rate of this reaction can be expressed in terms of time derivative of concentration of N₂ (g), H₂ (g) or NH₂ (g). Identify the correct relationship amongst the rate expressions

A

B

C

D
Question 8
4 / -1

The reaction 2N₂O₅ → 2N₂O₄ + O₂ is

A
Bimolecular and second order

B
Unimolecular and first order

C
Bimolecular and first order

D
Bimolecular and zero order
Question 9
4 / -1

The activation energy for a simple chemical reaction A → B is E_a in forward direction. The activation energy for the reverse reaction

A
is negative of E_a

B
is always less than E_a

C
can be less than or more than E_a

D
is always double of E_a
Question 10
4 / -1

A
A is adsorption factor

B
E_a is energy of activation

C
R is Rydberg constant

D
K is equilibrium constant