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9f: Patterns of Reactivity
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When iron reacts with oxygen we call it
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rusting
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corrosion
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air damage
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Water damage
Which of the following conditions will cause the iron nail to rust the fastest?
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Iron nail in a test tube with salty water
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Iron nail in a test tube with boiled water and a layer of oil on the surface
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Iron nail in a test tube with anhydrous calcium chloride and sealed with a bung
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Iron nail in a test tube with tap water
Which of the following methods is not used to prevent metals corroding?
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Sanding down
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Plating
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Painting
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Greasing
When substances react with oxygen they form
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oxides
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chlorides
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hydroxides
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sulphides
Which of the following is not an example of a physical property?
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How quickly it reacts
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How Strong it is
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How hard it is
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What temperature it melts at
Which of the following is not used to find the order of reactivity?
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Metal + Alkali
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Metal + Water
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Metal + Air
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Melt + Acid
Because calcium is more reactive than copper it will take away the oxygen from it. This type of reaction is called a ………….reaction
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displacement
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competition
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fight
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reactivity
Using your knowledge of the reactivity series which of the following reactions will not take place?
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potassium oxide + copper
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copper oxide + magnesium
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magnesium oxide + sodium
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iron oxide + zinc
Using your knowledge of the reactivity series which of the following reactions will not take place?
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calcium oxide + magnesium
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calcium oxide + sodium
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calcium oxide + potassium
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tin oxide + calcium
Using your knowledge of the reactivity series which of the following reactions would take place the fastest?
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copper oxide + potassium
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iron oxide + calcium
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tin oxide + sodium
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zinc oxide + magnesium
Which of these is not an indicator as to whether a reaction has taken place or not?
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Change in state (solid to liquid)
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Change in colour
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Change in smell
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A gas being given off
An alloy is
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a mixture of metals
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a compound of metals
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a pure metal
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a mixture of aluminium and other metals
The properties of alloys are
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different to the individual metals
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the same as the individual metals
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always changing so cannot be predicted
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always better than the original metals
Brass is a mixture of
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copper and zinc
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zinc and lead
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copper and tin
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zinc and magnesium
Solder is a mixture of
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lead and tin
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lead and copper
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copper an zinc
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tin and magnesium
Metals found in their natural state are usually
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Unreactive
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reactive
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those with high melting points
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gold in colour
Metals high in the reactivity series usually have to be
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extracted from their ores
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heated to remove impurities
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reacted with acids before use
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mixed with other metals before they can be used
An ore is
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a metal-bearing rock
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a way to extract metals
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an Unreactive metal
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a reactive metal dissolved in water
Unreactive metals …………….slowly
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tarnish
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rust
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melt
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boil
More reactive metals need to be extracted using
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electricity
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heat
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acids
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alkalis
Which of the following is not a chemical property
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How strong it is
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How readily it reacts with water
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How easily it forms compounds
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How it behaves with acids
Which property is most important when choosing a material to build a car?
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Both the chemical and the physical
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Only the chemical properties
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Only the physical properties
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It doesn't matter as long as it is the same one for each material so as to be fair
The reaction between aluminium and iron oxide is called the
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thermit reaction
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hermit reaction
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hobbit reaction
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fusion reaction
Exothermic reactions
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give out heat energy
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take in heat energy
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need heat to start
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are the final stage of a reaction
Endothermic reactions
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take in heat energy
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give out heat energy
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are the final stages of a reaction
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is the way we can explain all chemical reactions
Whenever a chemical reaction takes place energy is
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transferred
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lost
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gained
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created
Which of the following is not a chemical change?
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Dissolving sugar in water
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Baking a loaf of bread
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Burning a fuel
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Striking a match
Which of the following is not a physical change?
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Making copper sulphate from copper oxide and sulphuric acid
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Freezing water to form ice cubes
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Melting a bar of plain chocolate
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Boiling a kettle full of water to produce steam
Malachite is the ore for
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copper
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iron
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gold
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aluminium
Another word for when metals become discoloured after reacting with the air is
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tarnishing
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reacting
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rusting
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colouring
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