Year 9 Chemistry Test - Limestone
A Year 9 Chemistry Quiz
- 1.Slaked lime is a common name for which one of the following?
- A.
Calcium carbonate
- B.
Calcium oxide
- C.
Calcium hydroxide
- 2.How do you produce calcium oxide from calcium carbonate?
- A.
By heating it
- B.
By adding water to it
- C.
By neutralising excess acidity
- 3.Limestone is mostly made of what?
- A.
Calcium oxide
- B.
Calcium carbonate
- C.
Calcium hydroxide
- 4.Water is one of the ingredients of concrete. What are the other ingredients?
- A.
Clay, sand and crushed rock
- B.
Soda, sand and crushed rock
- C.
Cement, sand and crushed rock
- 5.What is an advantage of using concrete to make building foundations?
- A.
It is strong when stretched.
- B.
It is strong when squashed.
- C.
It is worn away by acid rain.
- 6.What is a benefit of a limestone quarry?
- A.
There is a lot of dust and noise.
- B.
There is employment for local people.
- C.
It causes acid rain.
- 7.Which of the following is a disadvantage of using glass for windows?
- A.
It is transparent.
- B.
It is tough and difficult to break.
- C.
It can trap too much heat in a building in the summer.
- 8.Why can gold be found in the Earth's crust in its native state?
- A.
Gold is more reactive than silver.
- B.
Gold is very unreactive.
- C.
Gold is very rare.
- 9.Why is aluminium extracted from aluminium ore by electrolysis?
- A.
Aluminium is more reactive than carbon.
- B.
Aluminium is less reactive than carbon.
- C.
Aluminium is an expensive metal.
- 10.Why is iron extracted from iron ore by reduction with carbon or carbon monoxide?
- A.
Iron is more reactive than carbon.
- B.
Iron is less reactive than carbon.
- C.
Iron is a cheap metal.
- 11.Which properties make aluminium suitable for overhead mains electricity cables?
- A.
It has a low density and is a good conductor of electricity.
- B.
It is shiny and is a good conductor of heat.
- C.
It is a good conductor of electricity and heat.
- 12.What happens to iron oxide in a blast furnace?
- A.
It is oxidised to form iron.
- B.
It is electrolysed to form iron.
- C.
It is reduced to form iron.
- 13.In comparison with steel, what is pure iron like?
- A.
Harder
- B.
Magnetic
- C.
Softer
- 14.What is the percentage of iron in the iron from a blast furnace?
- A.
100%
- B.
96%
- C.
4%
- 15.Which type of steel is likely to be used for making cutlery?
- A.
Low carbon steel
- B.
High carbon steel
- C.
Stainless steel
- 16.Why are alloys likely to be harder than pure metals?
- A.
Because layers of atoms can slide over each other easily.
- B.
Because layers of atoms cannot slide over each other easily.
- C.
Because their atoms are denser and harder than those of pure metals.
- 17.Transition metals are like other metals in what ways?
- A.
They are dull.
- B.
They are good conductors of electricity.
- C.
They are on the right hand side of the periodic table.
- 18.What process is used to purify copper?
- A.
Electrolysis
- B.
Filtration
- C.
Reduction in a blast furnace
- 19.Why does aluminium not corrode quickly?
- A.
It is an unreactive metal.
- B.
It has a thin layer of aluminium oxide on its surface.
- C.
It reacts with oxygen but not with water.
- 20.Why is titanium expensive to extract from its ore?
- A.
It resists corrosion.
- B.
Several stages are involved.
- C.
Its ore is rare.
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