Transcript Metal - HKEdCity

Metal
1. Which of the following metals are firstly used
by human?
Only (i) and (ii)
(i) gold
(ii) silver
(iii) copper
Only (i)、(ii) and (iii)
(iv) bronze
(v) iron
Only (i)、(ii) 、 (iii) and (iv)
(i)、(ii) 、 (iii) 、(iv) and (v)
2. Which of the followings are properties of gold?
(i) It rarely combine with
other substances .
Only (i) and (ii)
(ii) It has a very unique colour
Only (i), (ii), (iii)
(iii) It is relatively hard
(iv) It is relatively soft
Only (i), (ii) and (iv)
(i), (ii), (iii), (iv)
3. Gold are mainly used to make
daily utensils.
decorative items.
coins.
electric wire.
4. Throughout history, silver is always be used to
make
daily utensils.
electric wire.
coins.
musical instruments.
5. Why copper is widely used in daily life?
It is because copper is cheap.
It is because copper is available in great
quantity.
It is because copper is a good conductor of
electricity.
It is because copper is a good conductor of
heat.
6.Many daily utensils are made of bronze
instead of copper. It is because
bronze is cheaper than copper.
bronze is harder than copper.
the colour of bronze is more beautiful.
using copper to produce daily utensils is
more expensive than bronze.
7. The history of using metals is closely related to :
(I) The properties of the
metal
(II) The abundance of the
metal on earth
(III)The level of difficulty in
extracting the metal
(I) only
(II) only
(I) & (II) only
(I) & (III) only
8. Most metals have combined with ______ and exist in the
form of metal ores on earth.
(I) carbon
(II) oxygen
(III)sulphur
(IV)hydrogen
(I) only
(I) & (II) only
(I), (II)& (III) only
(I) , (II), (III) & (IV)
9. Metals ores mainly consists of ______ of metals
(I) oxides
(II) sulphides
(III)halides
(IV)carbonates
(V) sulphates
(I) and (II) only
(I) & (II) & (III) only
(I), (II), (III) & (IV) only
(I) , (II), (III) , (IV)& (V)
10. From the view of chemistry, the principle of
extracting metal from ore is
by using the method of carbon reduction
and extract the metal from the ore.
to melt the metal ore.
to decompose the metal ore
to separate the metal from other
substances in the metal ore
11. Aluminium can be used to make aeroplanes,
space shuttles and the outer layer of trains, because
aluminium is a good conductor of electricity.
aluminium is available in great quantity.
aluminium is cheap.
aluminium has low density, but it is very hard.
12. Which of the following is NOT the properties of
copper ?
Good conductor of electricity.
High ductility and malleability .
Corroded by air easily .
Good conductor of heat.
13. Which of the following property of gold and
silver make them can act as good reflectors?
Great mechanical strength.
They combine with oxygen in air and form
a layer of oxide on the surface.
Shininess.
High electrical conductivity.
14. Which of the following correctly states the
application of lead and magnesium?
Lead – to insulate against radiation
Magnesium – making fireworks
Lead – tinted on the surface of the satellite
Magnesium – to insulate against radiation.
Lead – tinted on the back surface of glass
Magnesium – making fireworks
Lead – to insulate against radiation
Magnesium – tinted on the surface of the satellite.
15. Which of the following is the only metal in
liquid form?
Mercury
Titanium
Chromium
Manganese
16. Bronze is a metal alloy made from
copper and iron.
copper and aluminium.
copper and tin.
copper and zinc.
17. Brass is a metal alloy made from
copper and iron.
copper and aluminium.
copper and tin.
copper and zinc.
18. Solder is a metal alloy made from
lead and tin.
lead and copper.
iron and tin.
iron and copper.
19. Carbon steel is a metal alloy made from carbon
and _________.
copper
iron
zinc
steel
21. The % of carbon in carbon steel is about
1%
2%
10%
20%
22. Stainless steel is a metal alloy made from
iron and tin.
iron and chromium.
iron and zinc.
iron and steel.
23. The % of chromium in stainless steel is not
less than
2%
5%
12%
20%
23. Shape-memory alloy can memorize shapes. It
is because
shape-memory alloy has only one phase in
their solid state.
shape-memory alloy has two different
phases in their solid state.
shape-memory alloy has three different
phases in their solid state.
particles of shape-memory alloy have
different arrangement in solid and liquid
state.