C1 Knowledge Test

  1. Write the formula for the first three alkanes
  2. Write the formula for the first two alkenes
  3. How do we test for the presence of alkenes?
  4. What process breaks down large hydrocarbons?
  5. What substance is formed from the polymerisation of ethane?
  6. Complete this table to give the uses of these polymers:

Polymer
Polyethene
Polypropene
Polychloroethene (PVC)
Teflon
  1. What mineral is limestone made from?
  2. Give two disadvantages of quarrying limestone
  3. Give one advantage of quarrying limestone
  4. Chalk, limestone and marble are all made of which mineral?
  5. Calcium carbonate is mined to form which three everyday items?
  6. Write a word equation for the thermal decomposition of limestone
  7. Where did the gases that formed the Earths early atmosphere come from?
  8. How do scientists use rocks to work out the composition of the Earth’s early atmosphere?
  9. Name 4 gases other than oxygen and carbon dioxide that were present in the Earth’s early atmosphere.
  10. How much CO2 was present in the Earths early atmosphere?
  11. Describe two ways that the carbon dioxide levels in the early atmosphere were reduced.
  12. How much oxygen was present in the Earths early atmosphere?
  13. How did photosynthesis affect the composition of the atmosphere?
  14. How do scientists believe the oceans were formed?
  15. Complete this table to show the current composition of the Earths atmosphere:

Gas / Formula / % in dry air
  1. What effect does deforestation have on the amount of carbon dioxide in the atmosphere.
  2. Explain your answer
  3. State 3 ways humans changed the composition of the atmosphere.
  4. How do we test for carbon dioxide?
  5. What two different substances does incomplete combustion produce as compared to complete combustion?
  6. Give two ways scientists are trying to reduce the amount of carbon dioxide in the atmosphere.
  7. Why is carbon monoxide toxic?
  8. What 2 main gases do volcanoes release into the atmosphere.
  9. What type of rock is marble?
  10. Name 2 sedimentary rocks
  11. How are sedimentary rocks formed?
  12. What two factors are required to form metamorphic rock?
  13. What are igneous rocks formed from?
  14. What affects the size of crystals in in igneous rock?
  15. Name an igneous rock
  16. Which type of rock may contain fossils?
  17. Which type of rock is easy to wear away?
  18. What can you say about the mass of reactants and the mass of products in a reaction?
  19. What are the smallest particles of an element that can take part in a reaction?
  20. Write a word equation for the reaction between water and calcium oxide.
  21. What is formed when calcium hydroxide is dissolved in water?
  22. Give 2 uses of calcium carbonate in industry.
  23. Give 2 uses of hydrochloric acid in the stomach.
  24. Write a word equation for the reaction between hydrochloric acid and calcium carbonate
  25. What type of salts are formed from hydrochloric acid; nitric acid; sulfuric acid
  26. How do we test for oxygen?
  27. How do we test for Hydrogen?
  28. How do we test for chlorine?
  29. What three substances can neutralise acids?
  30. What process decomposes compounds using an electrical current?
  31. How can chlorine be extracted from seawater?
  32. Name two substances produced from chlorine.
  33. What is produced during the electrolysis of water?
  34. Name the top two and bottom two metals in the reactivity series
  35. Why is gold used for jewellery?
  36. Why is copper used for electrical wires?
  37. Where do most metals originate?
  38. What is an alloy?
  39. Why is iron often alloyed?
  40. State two uses of new alloys developed by scientists.
  41. Describe two ways of extracting metals from their ores.
  42. What type of reaction involves gain of oxygen?
  43. What is another term for the oxidation of metals?
  44. Which part of the reactivity series contains metals least likely to corrode?
  45. What two elements do hydrocarbons contain?
  46. Write a word equation for the combustion of a hydrocarbon.
  47. Crude oil is a mixture of…
  48. What is the purpose of fractional distillation?
  49. Complete this table to give a use of each of these fractions:

Fraction / Use
Gases
petrol
Kerosene
Diesel oil
Fuel oil
Bitumen
  1. What happens to the boiling point of the fractions as they get longer?
  2. What gas is produced due to the impurities in fossil fuels?
  3. What substance weathers limestone, damages trees and makes lakes and rivers acidic?
  4. Name 3 greenhouse gases.
  5. What is ethanol produced from?
  6. Give 4 factors of a good fuel.

C1 Knowledge Test Answers

  1. CH4, C2H6, C3H8
  2. C2H4, C3H6
  3. Bromine water will discolour
  4. Cracking
  5. Polyethene
  6. .

Polymer / Use
Polyethene / Plastic bags, plastic bottles, cling film, insulation for electrical wires
Polypropene / Buckets and bowls
Polychloroethene (PVC) / Window frames, gutters, pipes, insulation for electrical wires
Teflon / Non stick coatings for saucepans, bearings for skis, containers for corrosive substances, stain proof coating for carpets, insulation for electrical wires
  1. Calcium Carbonate
  2. Noise pollution, destroys habitats, land cannot be used for farming, destroy views
  3. Jobs, valuable export.
  4. Calcium Carbonate
  5. Glass, cement and concrete
  6. Calcium carbonate  Calcium oxide + carbon dioxide
  7. Volcanic activity
  8. Analyse the minerals in them and look for oxides.
  9. Nitrogen, ammonia, methane, water vapour
  10. Lots
  11. CO2 dissolved into the oceans, incorporation into marine organisms shells.
  12. Little/none
  13. Removed CO2, added O2
  14. Condensation of water vapour.
  15. .

Gas / Formula / % in dry air
Nitrogen / N2 / 78
Oxygen / O2 / 21
Argon / Ar / 0.9
Carbon Dioxide / CO2 / 0.04
other / trace
  1. Increases it
  2. Trees no longer remove carbon dioxide through photosynthesis.
  3. Burning fossil fuels, farming, deforestation
  4. Turns limewater cloudy
  5. Carbon monoxide and carbon
  6. Iron seeding, converting carbon dioxide into hydrocarbons
  7. Takes the place of oxygen in RBC
  8. Carbon dioxide and nitrogen
  9. Metamorphic
  10. Chalk and limestone
  11. Compaction of layers of sediment over a long time
  12. Heat and pressure
  13. Cooled magma or lava
  14. The rate at which it cooled down
  15. Granite
  16. Sedimentary
  17. Sedimentary
  18. The same
  19. Atoms
  20. Calcium oxide + water Calcium hydroxide
  21. Limewater
  22. Neutralise soils, remove gases from powerstations
  23. Helps digestion, kills bacteria
  24. hydrochloric acid + calcium carbonate  calcium chloride + water + carbon dioxide
  25. Chlorides, nitrates, sulfates
  26. Relight a glowing splint
  27. Burns with a squeaks pop
  28. Bleach damp blue litmus paper
  29. Metal oxides, metal hydroxides, metal carbonates
  30. Electrolysis
  31. Electrolysis
  32. Bleach, PVC
  33. Hydrogen and oxygen
  34. Potassium, sodium and gold, platinum
  35. Unreactive and does not corrode
  36. Good electrical conductor
  37. In the Earths crust as ores
  38. A mixture of two metals
  39. Increase strength and reduce corrosion
  40. Stents in damaged blood vessels, memory spectacle frames
  41. Heating/reduction with carbon, electrolysis
  42. Oxidation
  43. Corrosion
  44. Bottom
  45. Hydrogen and carbon
  46. Hydrocarbon + Oxygen  Carbon Dioxide + Water
  47. Hydrocarbons
  48. Splits crude oil into simpler substances
  49. .

Fraction / Use
Gases / Domestic heating and cooking
petrol / Fuel for cars
Kerosene / Fuel for aircraft
Diesel oil / Fuel for cars and trains
Fuel oil / Fuel for ships and power stations
Bitumen / Surfacing roads and roofs
  1. Increases
  2. Sulfur dioxide
  3. Acid rain
  4. Carbon dioxide, methane, water vapour
  5. Sugar beet or sugar cane
  6. Ease of burning, ease of transport, amount of smoke produced, amount of heat energy liberated.