Free Printable Electricity and Chemistry

1.

Which of the following is a conductor?

a)

Plastic

b)

Iron

c)

Wood

d)

Ceramin

2.

Which of the following are insulators? Select two correct answers.

a)

Oil

b)

Rubber

c)

Tin

d)

Aluminium

3.

What is an electrolyte?

a)

A liquid that contains ions, and therefore conducts electricity.

b)

A liquid that does not contains ions, and therefore does not conduct electricity.

c)

A liquid that contains electrons, and therefore conducts electricity.

d)

A liquid that does not contains electrons, and therefore does not conduct electricity.

4.

State True or false.

Electrolysis is a redox reaction. Reduction takes place at the cathode and oxidation at the anode.

a)

True

b)

False

5.

Which ions are present in a molten solution of NaCl? Select the two correct answers.

a)

$Na^+$

b)

$Na^-$

c)

$Cl^+$

d)

$Cl^-$

6.

Which ions are present in a molten solution of Aluminium oxide? Select the two correct answers.

a)

$Al^{+2}$

b)

$Al^{+3}$

c)

$O^{-2}$

d)

$O^{-3}$

7.

Identify the type of reaction.

$Mg^{+2}\ +\ 2e^{-\ }\rightarrow\ Mg$

a)

This is an oxidation reaction.

b)

This is a reduction reaction.

c)

This is a redox reaction.

d)

8.

The half-equations for an electrolysis process are shown.

What is the net ionic equation?

a)

$Mg^{\ }+\ Cl_2\ \rightarrow\ MgCl_2$

b)

$Mg^{+2\ }+\ 2Cl^-\ \rightarrow\ Mg^+\ +\ 2Cl^-$

9.

Fill in the blank to state the correct number of electrons needed to neutralise the ion.

$2Cu^{+2}\ +\ldots\ldots\ \longrightarrow\ 2Cu$

a)

2

b)

4

c)

6

d)

8

10.

The diagram shows the set-up of the apparatus used to electroplate an iron key with silver. What is observed at the anode and cathode after 30 minutes?

a)

Silver foil becomes thinner at cathode.

b)

Silver foil becomes thinner at anode.

c)

Shiny grey deposits are formed at anode.

d)

Shiny grey deposits are formed at cathode.

11.

When molten lead(II) iodide solution is electrolysed using carbon electrodes, which of the following represents the half-equation that occurs at the cathode?

a)

A

b)

B

c)

C

d)

D

Electricity and Chemistry

Total questions: 11

Worksheet time: 11mins

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