This Year 9 Chemistry Test on Limestone assesses knowledge on limestone's composition, its derivatives like calcium oxide and hydroxide, and uses in concrete. It evaluates understanding of limestone processing and benefits, crucial for foundational chemistry education.
Low carbon steel
High carbon steel
Stainless steel
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There is a lot of dust and noise.
There is employment for local people.
It causes acid rain.
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They are dull.
They are good conductors of electricity.
They are on the right hand side of the periodic table.
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It is strong when stretched.
It is strong when squashed.
It is worn away by acid rain.
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100%
96%
4%
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Calcium oxide
Calcium carbonate
Calcium hydroxide
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Clay, sand and crushed rock
Soda, sand and crushed rock
Cement, sand and crushed rock
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Gold is more reactive than silver.
Gold is very unreactive.
Gold is very rare.
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By heating it
By adding water to it
By neutralising excess acidity
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It has a low density and is a good conductor of electricity.
It is shiny and is a good conductor of heat.
It is a good conductor of electricity and heat.
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Aluminium is more reactive than carbon.
Aluminium is less reactive than carbon.
Aluminium is an expensive metal.
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Iron is more reactive than carbon.
Iron is less reactive than carbon.
Iron is a cheap metal.
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It resists corrosion.
Several stages are involved.
Its ore is rare.
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Electrolysis
Filtration
Reduction in a blast furnace
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Calcium carbonate
Calcium oxide
Calcium hydroxide
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Harder
Magnetic
Softer
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It is an unreactive metal.
It has a thin layer of aluminium oxide on its surface.
It reacts with oxygen but not with water.
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It is oxidised to form iron.
It is electrolysed to form iron.
It is reduced to form iron.
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Because layers of atoms can slide over each other easily.
Because layers of atoms cannot slide over each other easily.
Because their atoms are denser and harder than those of pure metals.
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