1. A
   Calcium hydrogen carbonate
2. B
   Calcium carbonate
3. C
   Calcium acetate
4. D
   Sodium carbonate

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1. A
   2
2. B
   8
3. C
   18
4. D
   32

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1. A
   ethanoic acid
2. B
   nitric acid
3. C
   sulphuric acid
4. D
   tartaric acid

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1. A
   Buckminsterfullerene is an allotrope of carbon
2. B
   Diamond is a good conductor of electricity
3. C
   Graphite is a good conductor of electricity
4. D
   In graphite, each carbon atom is linked to three other carbon atoms

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1. A
   6
2. B
   8
3. C
   9
4. D
   10

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1. A
   Melting point
2. B
   Atomic number
3. C
   Colour
4. D
   Atomic weight

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1. A
   James Chadwick
2. B
   Ernest Rutherford
3. C
   J. J. Thomson
4. D
   John Dalton

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1. A
   electrons and protons only
2. B
   protons and neutrons only
3. C
   electrons and neutrons only
4. D
   electrons, protons and neutrons

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1. A
   Uranium
2. B
   Cobalt
3. C
   Sodium
4. D
   Iodine

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1. A
   Carbon dioxide
2. B
   Hydrogen
3. C
   Water vapour
4. D
   Oxygen

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1. A
   5, 10 and 2 respectively
2. B
   10, 2 and 5 respectively
3. C
   5, 2 and 10 respectively
4. D
   2, 5 and 10 respectively

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1. A
   Yellow – pink – blue
2. B
   Yellow – reddish brown – yellow
3. C
   Yellow – reddish brown – blue
4. D
   Yellow – blue – pink

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1. A
   Both are inorganic compounds
2. B
   Both are organic compounds
3. C
   Both contain chlorine
4. D
   Both contain calcium

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1. A
   Silica gel
2. B
   Polystyrene
3. C
   Sodium chloride
4. D
   Sodium carbonate

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1. A
   Sulphuric acid
2. B
   Hydrochloric acid
3. C
   Nitric acid
4. D
   Phosphoric acid

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1. A
   1, 2 and 3
2. B
   2 and 3 only
3. C
   2 only
4. D
   3 only

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1. A
   Hydrogencarbonates
2. B
   Carbonates
3. C
   Chlorides
4. D
   Sulphates

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1. A
   Acetic acid
2. B
   Methanoic acid
3. C
   Sulphuric acid
4. D
   Hydrochloric acid

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1. A
   Lithium
2. B
   Sodium
3. C
   Potassium
4. D
   Cesium

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1. A
   Electron
2. B
   Proton
3. C
   Nucleus
4. D
   Helium

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1. A
   liquid
2. B
   colloid
3. C
   non-crystalline amorphous solid
4. D
   crystalline solid

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1. A
   By filtration
2. B
   By evaporation
3. C
   By distillation
4. D
   By condensation

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1. A
   Oxygen
2. B
   Hydrogen
3. C
   Chlorine
4. D
   Carbon

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1. A
   Aluminium
2. B
   Iron
3. C
   Zinc
4. D
   Silver

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1. A
   5%
2. B
   9%
3. C
   10%
4. D
   15%

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