CAIE IGCSE Chemistry 9.6 Extraction of Metals Topic Practice

CourseCourseConceptConceptDocumentDocument

Covered syllabus points

9.6.1—Ease in obtaining metals from their9.6.2—Iron extraction from hematite in a9.6.3—Main ore of aluminium is bauxite and9.6.4—Symbol equations for the extraction of9.6.5—Aluminium extraction from purified

Question 1

[Maximum number: 7]

This question is about metals.

Question (a)

(a)

Fig. 6.1 shows a blast furnace used to extract iron from its ore.

Fig. 6.1

Fig. 6.1

[ 6 ]

Question (i)

(i)

Coke and iron ore are added at the top of the blast furnace.

Name one other substance that is added at the top of the blast furnace.

[ 1 ]

Question (ii)

(ii)

Name the substance that leaves the blast furnace at A.

[ 1 ]

Question (iii)

(iii)

Slag is produced from an impurity in iron ore.

Name the impurity in iron ore that is converted into slag.

[ 1 ]

Question (iv)

(iv)

Name two substances that react together to produce the high temperature in the blast furnace. and

[ 1 ]

Question (v)

(v)

Name two waste gases that leave the blast furnace.

1

2

[ 2 ]

Question (b)

(b)

Zinc is produced from zinc oxide in a furnace.

The zinc is produced as a gas. It then forms molten zinc.

[ 1 ]

Question (i)

(i)

Suggest why the zinc produced inside the furnace is a gas.

[ 1 ]

Question 2

[Maximum number: 1]

Which statement about the extraction of metals is correct?

A

Aluminium is extracted from the ore bauxite by electrolysis.

B

Aluminium is extracted from the ore hematite by electrolysis.

C

Iron is extracted from the ore bauxite by electrolysis.

D

Iron is extracted from the ore hematite by electrolysis.

Question 3

[Maximum number: 1]

Which equation represents the reduction of a compound found in hematite in the blast furnace?

A

2Al2O3→4Al+3O22 \mathrm{Al}_{2} \mathrm{O}_{3} \rightarrow 4 \mathrm{Al}+3 \mathrm{O}_{2}

B

CaO+SiO2→CaSiO3\mathrm{CaO}+\mathrm{SiO}_{2} \rightarrow \mathrm{CaSiO}_{3}

C

2FeO+CO→Fe2O3+C2 \mathrm{FeO}+\mathrm{CO} \rightarrow \mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{C}

D

Fe2O3+3CO→2Fe+3CO2\mathrm{Fe}_{2} \mathrm{O}_{3}+3 \mathrm{CO} \rightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_{2}

Question 4

[Maximum number: 1]

This question is about metals.

Zinc is produced from zinc oxide in a furnace.

The zinc is produced as a gas. It then forms molten zinc.

Suggest why the zinc produced inside the furnace is a gas.

Question 5

[Maximum number: 1]

Why is cryolite used in the extraction of aluminium by electrolysis?

A

It dissolves the aluminium oxide.

B

It protects the anodes from corrosion.

C

It changes bauxite to aluminium oxide.

D

It decreases the melting point of the aluminium.

All question bank results loaded