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WorksheetsAlloys
Total questions: 33
Worksheet time: 30mins
All alloys are mixtures.
True
False
Mixtures that do NOT behave as a pure substance have a melting range, not a melting point.
True
False
What do metals conduct well?
heat
electricity
circulation
music
All metal elements melt at the same boiling point.
True
False
What can act as an insulator, preventing the movement, of electricity?
glass
wood
rubber
copper
What do you measure of a metal when you dent it?
hardness
cleavage
luster
streak
The most common element added to iron to create steel alloy is ...
tungsten
vanadium
chromium
carbon
This type of steel was discovered by accident when an experiment went wrong, and includes over 11% of chromium
stainless steel
high strength steel (HSS)
structural steel
sheet steel (used for thin parts)
Varying the amounts of additives added to iron changes the properties of the steel alloy created. The material properties which can be effected are ...
hardness
ductility
tensile strength
opacity
Rusting is the corrosion of:
Zinc
Iron
Lithium
Nickel
Why does rusting weaken the iron?
The rust (Iron (III) Oxide) sticks to the iron
The rust (Iron (III) Oxide) makes the iron lighter
The rust (Iron (III) Oxide) makes the iron heavier
The rust (Iron (III) Oxide) flakes off and reduces the amount of iron
Corrosion of iron can be prevented by:
Painting it
Storing the metal in an reactive atmosphere
Adding extra oxygen to the air around it
Adding salt water, rather than normal water
Rusting can be prevented by?
Storing in a reactive atmosphere
Storing under oil
Storing under water
Storing in oxygen
Rusting can be prevented by?
removing water
Using desiccant powder
Coating it with plastic
All of the above
Rusting can be prevented by?
Removing paint
Adding water
keeping air (oxygen) away
All of the above
Sacrificial protection is?
Preventing rusting by keeping air away
Prevents rusting by attaching a more reactive metal that will oxidise first
Preventing rusting by keeping water away
Applying oil to a metal
What is tarnishing?
When a metal corrodes and breaks away
When a metal is exposed to the air and reacts with the water vapour in the air
When a metal is exposed to the air and reacts with the oxygen to form an oxide layer
When a non-metal is exposed to the air and reacts with water vapour to make an oxide layer
What is electroplating?
Coating of the surface of one metal with a thick layer of another
Coating of the surface of one metal with a more reactive metal
Coating of the surface of one metal with a less reactive metal
Coating of the surface of a metal with a thin layer of another metal
Why would you electroplate a metal?
To improve a metals ability to resist corrosion
To decrease a metals ability to resist corrosion
To let more air get to the metal you are plating
To trap a layer of water next to the metal you are electroplating
What are uses of electroplating?
Prevent corrosion
Prevent tarnishing
To improve the appearance of a metal
All of the above
Why are metals alloyed?
To improve the appearance of a metal
To make them less likely to corrode
To reduce the amount of iron used
To change the properties of the metal
Why are alloyed metals usually stronger?
They have atoms of different metals in them, which makes it easier for the layer to move past each other...less likely to break
They have atoms of different metals in them, which makes it harder for the layer to move past each other...less likely to break
Why is steel alloyed with other metals?
To make It stronger
To make it lighter
To make it more resistant to corrosion
All of the above
Magnalium is an alloy of aluminium and magnesium. Why do they use this alloy for making aircraft?
Magnalium is lighter than magnesium
Magnalium is stronger than aluminium only
Magnalium is stronger and lighter than aluminium
Why is the alloy brass used to make coins and musical instruments?
The metals that make brass resist corrosion
Brass is strong
Brass is hard wearing
All of the above
The oxidation of a metal, so it becomes weaker over time is called?
Reduction
Displacement
Corrosion
Sacrificial protection
Transition metals are used in chemical processes because...?
They are all very reactive
They are all easy to obtain
They act as a catalyst
They are readily available
Which of these is a typical property of a transition metal?
Are found unreacted in nature
Has a reactions sequence
Forms covalent molecules
Forms coloured compounds
Which of these is a property of a transition metal?
High density
low density
Floats on water
Reacts with the water
Which of these is a property of a transition metal?
Low melting point
High melting point
poor conductor of heat
poor conductor of electricity
Which one is a transition metal?
Hydrogen (H)
Oxygen (O)
Nickel (Ni)
Phosphorus (P)
