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GCE O Level Chemistry: past questions and revision

For Form 5 students in Cameroon. 399 practice questions on 30 topics of the O Level Chemistry syllabus, from real GCE papers and checked practice questions.

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Sample GCE questions

Real O Level Chemistry questions. Register free to answer them, see the answers and get every step explained.

Sample 1 · Electrolysis

A current of 0.5A was passed through molten NaCl for 20minutes. Calculate the quantity of electricity in coulombs

  1. 10C
  2. 600C
  3. 100C
  4. 300C
Sample 2 · Introduction to transition metals

Transition metals are found in the D block and have characteristic properties. Some of which are 1 Formation of complexes 2 Good electrical conductivity 3 Catalytic activity 4 Good thermal conductivity

  1. If only 1, 2 and 3 are correct
  2. If only 1 and 3 are correct
  3. If only 2 and 4 are correct
  4. If only 4 is correct
Sample 3 · Acids, bases and salts

Which of the following salts can most appropriately be prepared by action of dilute acids on metals?

  1. Sodium chloride
  2. Silver chloride
  3. Barium sulphate
  4. Magnesium chloride
Sample 4 · The chemistry of Groups I and II metals

Why is sodium stored under paraffin oil?

  1. It tarnishes easily in air.
  2. It is insoluble in oil.
  3. It is soluble in water.
  4. It is a metal.
Sample 5 · The halogens

Statement (1): When drops of bromine are added into potassium iodide solution, purple black particles are seen in the solution. / Statement (2): Iodine is more reactive than bromine

  1. Both statements are true and the second statement is a correct explanation of the first
  2. Both statements are true and the second statement is NOT a correct explanation of the first
  3. First statement is true, second statement is false
  4. First statement is false, second statement is true
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