GCSE Chemistry Chemical Changes 2- Exam Style Questions with Answers

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Created on December 07, 2022 By

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GCSE_GEN_CHE_4_CHE CHANG_2

1 / 10

What is the reason for adding cryolite to the aluminium oxide?

To increase the amount of aluminium extracted

To lower the melting point of the mixture

To reduce the amount of aluminium oxide needed

To higher the melting point of the mixture

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Aluminium

Carbon

Oxygen

Sodium

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4 / 10

Bauxite contains a variable % of aluminium

Bauxite contains a variable % of cryolite

Bauxite contains a variable % of aluminium oxide

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Why can graphite conduct electricity?

Graphite exists in layers of atoms

Graphite has a giant structure

Graphite has a high melting point

Graphite has delocalised electrons

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Aluminium

Carbon

Oxygen

Sodium

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8 / 10

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Aluminium atoms gain electrons.

Aluminium atoms lose electrons.

Aluminium ions gain electrons.

Aluminium ions lose electrons.

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Combustion

Oxidation

Reduction

Redox

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