AQA Chemistry Unit 2

A quiz to help with revision for unit 2 AQA seperate sciences Chemistry. Th CGP GCSE Chemistry AQA revision guide was used to find the answers for all these questions. 

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What is different about the isotopes of an element?
They have a different number of neutrons
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What does the mass number of an element tell you?
The number of protons and neutrons
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What happens in Ionic bonding?
Atoms gain or lose an electron or electrons
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What do Ionic compounds always have?
Giant Ionic Lattices
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How can Ionic compounds conduct electricity?
They are dissolved in water or are melted
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What is Covalent bonding?
The sharing of electrons
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What are the characteristics of Simple Molecular Substances?
Very strong covalent bonds and weak intermolecular forces
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Giant covalent structures have high melting and boiling points, true or false?
True
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How many covalent bonds can a Carbon atom form?
4
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Why can metals conduct electricity and heat so well?
They have a sea of delocalised electrons
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Thermosetting polymer have weak intermolecular forces between polymer chains and Thermosoftening polymers have strong intermolecular forces between polymer chains, true or false?
False
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Number of moles = mass / Mr, True or false
True
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What are the advantages of using machines in analysing unknown substances?
Very sensitive, very fast and very accurate
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What four things does rate of reaction depend on?
Temperature, Concentration (or pressure), Catalyst and Surface area of solids.
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What is the collision theory?
The more collisions that occur, the faster the rate of reaction
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Catalysts are used up in a reaction, true or false?
False
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What is an Endothermic reaction?
One which takes energy from the surroundings and causes a fall in temperature
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What is an alkali?
A base that can dissolve in water
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Acids form hydrogen ions and alkalis form hydroxide ions, true or false?
True
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What is an electrolyte?
A solution that can conduct electricity and undergoes decomposition by electrolysis
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Oxidation is the loss of electrons, true or false?
True
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Oxidation and reduction always happen in electrolysis, true or false?
True
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Why is cryolite used in the electrolysis of aluminium ore?
To lower the temperature needed for it to happen
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When electroplating, which electrode is the object that you are going to plate?
The negative electrode (cathode)
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Other cards in this set

Card 2

Front

What does the mass number of an element tell you?

Back

The number of protons and neutrons

Card 3

Front

What happens in Ionic bonding?

Back

Preview of the front of card 3

Card 4

Front

What do Ionic compounds always have?

Back

Preview of the front of card 4

Card 5

Front

How can Ionic compounds conduct electricity?

Back

Preview of the front of card 5
View more cards

Comments

Moonman

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Good quiz

evelyn bury

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Really usefull :)

missy

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Sorry,but i think question 9 is wrong because the correct answer is marked as ionic but intermolecular forces only apply to covalent bonds.

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