Free Printable cat 2:Reversible reactions

Worksheets

cat 2:Reversible reactions

Total questions: 20

Worksheet time: 22mins

Name

Class

Date

What type of reactions can able to change products back to the their original form?

Reversible reactions

Irreversible reactions

Combustion reactions

Combination reactions

Which of the following changes is irreversible change?

Melting of ice cube

Heating hydrated CuSO₄

Frying an egg

Thermal decomposing NH₄Cl

Which of the following combination is correct?

reversible ⇌

irreversible →

reversible ←

irreversible →

reversible ⇌

irreversible ←

irreversible ⇌

reversible →

If a reversible reaction is exothermic in the forward direction, it will be ...

exothermic in the reverse direction

endothermic in the forward direction too

endothermic in the reverse direction

not involve energy in reverse direction

What is the symbol which is used in reversible reactions?

→

⇌

When amounts of reactants and products become constant in reversible reaction, what might happen to the reversible reaction?

Reversible reaction reaches equilibrium.

Reversible reaction fastens forward reaction.

Reversible reaction fastens reverse reaction.

Reversible reaction slows down forward reaction.

Which of the following reactions never goes completion in a closed container?

H_{2 +}I₂ ⇌ 2HI

C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O

NaOH + HCl → NaCl + H₂O

CuSO₄ + Zn → ZnSO₄ + Cu

Define chemical equilibrium.

A reaction is reversible.

The concentration of the reactants is equal to the concentration of the products.

The rate of a forward reaction is equal to the rate of the reverse reaction.

The reaction stops and no further change in concentration occurs.

For the reaction...
SO₂ + O₂ <−> SO₃
If the concentration of SO₂is increased, the equilibrium of the reaction will shift ___________.

left

right

left and right

neither left nor right

10.

For the reaction...
N_{2 (g)}+ 3 H₂ _(g) <−> 2 NH_{3 (g)}
If the pressure in the system is increased, which substance will increase in concentration?

N₂

H₂

N₂ and H₂

NH₃

11.

A substance that increases speed of chemical reaction without being being changed is called:

Catalyst

Acid

Base

pressure

12.

Increase in temperature of the reactants can do one of the following

Slow collision frequency

Allow less effective collision between the particles

Cause particles to lose speed

Increase collision between the particles thus increasing the rate.

13.

Consider the following reaction:
2SO_2(g)+ O_2(g)⇄ 2SO_3(g)+197 kJ/mol Which of the following will not shift the equilibrium to the right?

Adding more O₂

Adding a catalyst

increasing the pressure

Increasing the temperature

14.

The rate of a chemical reaction is NOT affected by which of the following:

temperature

concentration

particle size (surface area)

All of these affect reaction rates

15.

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

larger

smaller

16.

Metal is added to a solution in a test tube. The test tube now feels cooler. Do you assume a chemical reaction took place?

Yes

17.

Products will form faster if____________

the particle size of the reactants are larger.

temperature is decreased.

concentration of the reactants are increased.

the reaction is not stirred.

18.

The ___________ the surface area of the reactants, the faster the reaction rate.

larger

smaller

19.

Increasing the temperature will increase the kinetic energy of particles, therefore increasing the collisions between particles.

false

true

20.

Identify the incorrect statement about achieving equilibrium.

achieved when product and reactant concentrations are equal

achieved when forward and reverse reaction rates are same

achieved when concentration of reactants is stable/constant

achieved when concentration ratio of reactants to products becomes stable, thus fixing the equilibrium constant (equilibrium position)

100 %

cat 2:Reversible reactions

Total questions: 20

Worksheet time: 22mins

Similar Resources on Wayground