Grade Gorilla Logo Small

Chemistry CIE iGCSE:
Metals + Extraction

Page 1

home




Properties & uses of metals, alloys and extraction of metals

1. Which one of the following diagrams represents the structure of aluminium metal?  
aluminium particle diagrams x4

2. Aluminium is a very malleable metal and is used to make cooking foil.

 

Which statement explains why aluminium is malleable?

aluminium foil
Marco Verch | CC 2.0

  • A.  Aluminium atoms are arranged in layers so can slide over each other
  • B.  Aluminium atoms vibrate around fixed positions in the lattice
  • C.  Aluminium has strong metallic bonds which require a lot of energy to break
  • D.  Aluminium contains delocalized electrons which are free to move
3. Aluminium is used for food containers because it ...
  • A.   is a good conductor of electricity
  • B.   has a low density
  • C.   resists corrosion
  • D.   has a low melting point
4. Which one of the following statements best describes the structure of a metal?
  • A.   A giant lattice of atoms in a ‘sea of electrons’
  • B.   A giant lattice of atoms sharing electrons
  • C.   A giant lattice of positive and negative ions
  • D.   A giant lattice of positive ions in a ‘sea of electrons’
5. Aluminium alloys are used for airplanes because they ... airplane
  • A.   are good conductors of electricity
  • B.   have a low density
  • C.   are good conductors of heat
  • D.   have a low melting point
6. Copper is the metal used in most electrical wiring because it is a very good conductor of electricity. copper wires
Łukasz Klepaczewski
| Pixabay
Copper is a good conductor of electricity because it ..
  • A.   contains ions which are free to move
  • B.   contains atoms which are not free to move
  • C.   contains delocalized electrons which are free to move
  • D.   contains delocalized electrons which are not free to move
7. Alloys are typically stronger than pure metals because ...
  • A.   the metallic bonding is stronger in alloys
  • B.   the layers of metal atoms in the alloy cannot easily slide over each other
  • C.   alloys are covalently bonded and covalent bonds are strong
  • D.  the metals atoms are all very regularly arranged in alloys
8. Which of the following statements about steel is NOT correct?
  • A.   Stainless steel is used for cutlery as it does not rust
  • B.   Stainless steel is made by adding other elements to iron
  • C.   Mild steel is used for car bodies as it is strong and malleable
  • D.   Mild steel is a compound of iron and carbon
9. Mild steel is an alloy of iron and carbon. Which statement is true?
  • A.   The carbon makes the alloy softer than iron
  • B.   The carbon makes the alloy harder than iron
  • C.   The carbon stops the iron from rusting
  • D.   The carbon makes the alloy a better conductor than iron
10. Which property do ALL metals have?
  • A.   react with water
  • B.   low density
  • C.   conduct electricity
  • D.   react with dilute hydrochloric acid