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IGCSE Chemistry Mock – Set 1 Paper 4-Updated 2026

IGCSE Chemistry Mock – Set 1 Paper 4- Updated 2026

Preparing for your CIE IGCSE Chemistry exam can be daunting, but with the right approach, you can achieve your goals with CIE iGCSE Chemistry Mock test.

Ace your CIE iGCSE Chemistry exam! Find exam-style questions, detailed notes, and helpful resources to boost your understanding.

iGCSE Practice Questions, Past Papers, Flashcards and notes available for iGCSE Students at IITian Academy.

CIE iGCSE Chemistry Mock test – All Sets

Question 

A list of substances is shown:

bauxite, carbon dioxide, cryolite, ethane, ethanol, ethene, graphite, helium, hematite, hydrogen, silicon(IV) oxide, sodium chloride

Answer the following questions using only the substances from the list. Each substance may be used once, more than once or not at all.

State which substance:

(a) is manufactured by fermentation

(b) is monatomic

(c) is a reactant in photosynthesis

(d) is a solvent in the extraction of aluminium

(e) is an ore of iron

(f) is manufactured from methane

(g) is a compound with a giant covalent structure

(h) is used as a lubricant

(i) is tested for with limewater

▶️ Answer/Explanation
Solution

(a) ethanol or carbon dioxide

Ethanol is produced by fermentation of sugars, and carbon dioxide is a byproduct of this process.

(b) helium

Helium is a noble gas that exists as single atoms (monatomic), unlike other gases which are diatomic (e.g., H₂, O₂).

(c) carbon dioxide

In photosynthesis, plants use carbon dioxide and water to produce glucose and oxygen in the presence of sunlight.

(d) cryolite

Cryolite (Na₃AlF₆) is used as a solvent in the extraction of aluminium from bauxite to lower the melting point of the mixture.

(e) hematite

Hematite (Fe₂O₃) is one of the main ores of iron used in iron production.

(f) hydrogen

Hydrogen can be manufactured from methane through steam reforming or other chemical processes.

(g) silicon(IV) oxide

Silicon(IV) oxide (SiO₂) has a giant covalent structure where each silicon atom is covalently bonded to four oxygen atoms.

(h) graphite

Graphite is used as a lubricant because its layered structure allows the layers to slide over each other easily.

(i) carbon dioxide

Carbon dioxide is tested with limewater (calcium hydroxide solution), which turns milky/cloudy in its presence due to formation of calcium carbonate.

IGCSE Chemistry Mock Paper 4 - Full Access
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