Free Printable Chemical Kinetics

1.

Consider this reaction:

2SO_2(g)+ O_2(g) $\rightarrow$ 2SO_3(g)

The rate of disappearance of SO₂ is 1.6 gL^-1 min^-1. What is the rate of formation of SO₃ in molL^-1min^-1? [Molar mass SO₂: 64.0 gmol^-1]

a)

0.035

b)

0.025

c)

0.120

d)

0.050

2.

For the reaction, A(g) + B(g) $\rightarrow$ 2C(g), the rate equation is:

Rate = k[A]²[B]

If the concentration of reactant A is increase by triple at constant temperature, by what factor will the rate of reaction change?

a)

2

b)

6

c)

4

d)

9

3.

Given the following rate law,

rate = k[A]²[B]

if [A] were doubled, what must happen to [B] to keep the rate constant?

a)

[B] must quadruple

b)

[B] must double

c)

[B] must be havled

d)

[B] must be quartered

4.

The following data were measured for the reaction

BF₃(g) + NH_3(g) ⟶ F₃BNH_3(g)

What is the rate law for the reaction?

a)

rate = k[NH₃]

b)

rate = k[BF₃]²[NH₃]

c)

rate = k[BF₃][NH₃]

d)

rate = k[BF₃][NH₃]²

5.

What is the rate law for this mechanism?

a)

rate = k[A][B]²

b)

rate = k[B][X]²

c)

rate = k[A]^0.5[B]^1.5

d)

rate = k[W][Y][Z]

6.

What is the theory which explains how chemical reaction occurs?

a)

Diffusion

b)

Collision

c)

Big Bang

d)

Evalusion

7.

What letter represents the activation energy?

a)

A

b)

B

c)

C

d)

D

8.

The rate equation for the dimerization of NO2 is

$\frac{-\Delta\left[NO_2\right]}{\Delta t}=k\left[NO_2\right]2$

^{Which of the following changes will change the value of the rate constant, k?}

a)

Adding an inert gases to the mixture

b)

Adding more NO₂ to the reaction mixture

c)

Increasing the temperature of the reaction vessel

d)

Decreasing the volume of the reaction vessel

9.

The rate constant is doubles on the increasing temperature from 310K to 350K. What is the activation energy (in kJ mol-1) for this reaction?

a)

12.3

b)

15.6

c)

25.8

d)

29.2

10.

The rate of reaction between X and Y in the reaction, 2XY + Y₃ $\rightarrow$ XY₂ +XY₃ is given as,

Rate = k[XY][Y₃]²

Which of the following mechanism is consistent with the above rate equation?

a)

$XY\ +Y_{3\ }\rightarrow\ XY_2\ +\ Y_2\ \left(slow\right)$ $XY\ +\ Y_2\ \rightarrow\ XY_3\ \left(Fast\right)$

b)

$XY\ +\ Y_3\ \rightarrow\ XY_2\ +\ Y_2\ \left(Slow\right)$ $XY\ +\ Y_2\ \rightarrow\ Y_3\ \left(Fast\right)$

c)

$XY\ +2Y_3\ \rightarrow\ XY_2\ +\ Y_5\ \left(Slow\right)$ $XY\ +\ Y_5\ \rightarrow\ XY_3\ +Y_3\ \left(Fast\right)$

d)

$XY+2Y_3\ \rightarrow\ XY_2\ +Y_5\left(Fast\right)$ $XY\ +\ Y_5\ \rightarrow\ XY_3\ +\ Y_3\ \left(Slow\right)$

Chemical Kinetics

Total questions: 10

Worksheet time: 16mins

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