GCSE Chemistry - Elements, Compounds and Mixtures - 3 - Exam Style Questions with Answers

Created on January 27, 2023 By

paruppts12

GCSE_OCR_CHE_2_ELEMENTS_3

1 / 10

Fullerenes are molecules made of carbon.
Fullerenes are increasingly used as catalysts due to their large surface area.
Give one other use of fullerenes.

Alloys

Polymers

FuelCells

Lubricants

2 / 10

Gas

Plasma

Liquid

Solid

3 / 10

Ammonia has a simple molecular structure.
Which statement explains why ammonia has a low melting point and a low boiling point?

The covalent bonds between the atoms are strong.

The covalent bonds between the atoms are weak.

The intermolecular forces between the molecules are weak.

The intermolecular forces between the molecules are strong.

4 / 10

Carbon can form different allotropes.
Which of these are allotropes of carbon?

Fullerene, graphene, ethene.

Diamond, granite, graphite.

Granite, graphite, graphene.

Diamond, graphite, graphene.

5 / 10

A gold nanoparticle is a cube with sides of 2nm.
What is the simplest surface area to volume ratio of the nanoparticle?

3:1

12:3

16:1

24:8

6 / 10

Fine particles

Coarse particles

Dust particles

Nano particles

7 / 10

Graphite is a form of carbon. Graphite can conduct electricity.
Why can graphite conduct electricity?

The ions can move.

Layers have weak intermolecular forces.

Strongcovalentbonds are between the carbon atoms.

Delocalised electrons are between layers.

8 / 10

The size of a nano particle is similar to the size of a molecule.
What is the approximate size of a nanoparticle?

10,000 nm

1000 nm

0.01 nm

50 nm

9 / 10

Which statement about nano particulate materials is not correct?

Nanoparticles are much smaller than atoms

Nanoparticulate materials have an extremely large surface area to volume ratio.

There are possible risks when using nanoparticulate materials which are difficult to predict.

Nanoparticulate materials can be used as catalysts.

10 / 10

Which statement about diamond is correct?

It is a hard substance with a low melting point

It has a giant structure and conducts electricity

Each carbon atom is bonded to three others with strong covalent bonds

It has a high melting point with each carbon bonded to four others

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