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Chemistry 1999 JAMB Past Questions

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16
The set of pollutants that is most likely to be produced when petrol is accidentally spilled on plastic materials and ignited is
  • A. CO, CO2 and SO2
  • B. CO, HCL and SO2
  • C. CO, CO2 and HCL
  • D. SO2, CO2 and HCL
View Answer & Discuss (19) JAMB 1999
17
What is observed when aqueous solutions of each of tetraoxosulphate (VI) acid, potassium trioxoiodate (V) and potassium iodide are mixed together?
  • A. A white precipitate is formed
  • B. A green precipitate is formed
  • C. The mixture remains colourless
  • D. The mixture turns reddish brown
View Answer & Discuss (9) JAMB 1999
18
The solution with the lowest pH value is
  • A. 5 ml of (m/10) HCL
  • B. 10 ml of (m/10) HCL
  • C. 15 ml of (m/5) HCL
  • D. 20 ml of (m/8) HCL
View Answer & Discuss (27) JAMB 1999
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19
The solubility product of Cu(IO3)2 is 1.08 * 10-7. Assuming that neither ions react appreciable with water to form H+ and OH-, what is the solubility of this salt?
  • A. 2.7 * 10-8 mol dm-3
  • B. 9.0 * 10-8 mol dm-3
  • C. 3.0 * 10-3 mol dm-3
  • D. 9.0 * 10-3 mol dm-3
View Answer & Discuss (23) JAMB 1999
20
The entropy and enthalpy of a system are a measure of
  • A. degree of disorderlinesss and heat content respectively
  • B. heat content and degree of disorderliness respectively
  • C. heat content of a system only
  • D. degree of disorderliness only
View Answer & Discuss (4) JAMB 1999
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