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Test: Giant Covalent Molecules - Grade 10 MCQ


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10 Questions MCQ Test Chemistry for Grade 10 - Test: Giant Covalent Molecules

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Test: Giant Covalent Molecules - Question 1

Which of these substances has a giant covalent structure?

Detailed Solution for Test: Giant Covalent Molecules - Question 1

Silicon dioxide has a giant covalent structure.

Test: Giant Covalent Molecules - Question 2

Which statement about different forms of carbon is correct?

Detailed Solution for Test: Giant Covalent Molecules - Question 2

Graphite and graphene conduct electricity, but diamond does not.

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Test: Giant Covalent Molecules - Question 3

How many covalent bonds does each carbon atom in graphene form?

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Each covalent bond in graphene forms three covalent bonds.

Test: Giant Covalent Molecules - Question 4

What is the formula of buckminsterfullerene?

Detailed Solution for Test: Giant Covalent Molecules - Question 4

The formula of buckminsterfullerene is C60.

Test: Giant Covalent Molecules - Question 5

What is the shape of a nanotube?

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Nanotubes are cylindrical.

Test: Giant Covalent Molecules - Question 6

What type of bond joins the atoms together in a polymer molecule?

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Covalent bonds join the atoms together in a polymer molecule.

Test: Giant Covalent Molecules - Question 7

What properties do nanotubes have?

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Nanotubes conduct electricity and have high tensile strength.

Test: Giant Covalent Molecules - Question 8

Why is graphene a good conductor of electricity?

Detailed Solution for Test: Giant Covalent Molecules - Question 8

Graphene is a good conductor of electricity because it has delocalised electrons that are free to move across its surface.

Test: Giant Covalent Molecules - Question 9

Which statement best explains why diamond has a high melting point?

Detailed Solution for Test: Giant Covalent Molecules - Question 9

The best explanation is that diamond has a high melting point because a large amount of energy is needed to break its strong covalent bonds.

Test: Giant Covalent Molecules - Question 10

Which of these substances are slippery?

Detailed Solution for Test: Giant Covalent Molecules - Question 10

Graphite and buckminsterfullerene are slippery. This is because layers of graphite and buckminsterfullerene molecules can slide over each other.

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