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Thursday, 11 June 2026
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Chemistry Past Questions and Answers

Waec Chemistry Questions

Question 216:
The following salts are readily soluble in water except
  • A Na2CO3
  • B Pb(NO3)2
  • C KCI
  • D CuCO3
  • E PeSO4
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Question 217:
When sucrose is warmed with Fehling's solution
  • A A silver mirror is produced
  • B The solution turns milky
  • C A brick-red precipitate is formed
  • D There is no precipitate
  • E A blue coloration is produced
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Question 218:
Which of the following gases will have the highest rate of diffusion under the same conditions? (H = 1, C =12, O = 16, S = 32, CI = 35.5)
  • A O2
  • B CI2
  • C HCI
  • D H2S
  • E CO2
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Question 219:
The formula (CH3),3 COH is that of a
  • A Polyhdric alkanol
  • B Secondary alkanol
  • C Tertiary alkanol
  • D Primary alkanol
  • E Trihydric alkanol
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Question 220:
What is the number of oxygen atoms in 32g of the gas? (O = 16, L = 6.0 X 10,23 mol-1)
  • A 3.2 X 10 23
  • B 6.0 X 1023
  • C 1.2 X 1024
  • D 1.6 X 1024
  • E 2.0 X 1024
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