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Chemistry 1998 JAMB Past Questions

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1
The addition of water to calcium oxide leads to?
  • A. a physical change
  • B. a chemical change
  • C. the formation of a mixture
  • D. an endothermic change
View Answer & Discuss (7) JAMB 1998
2
A mixture of iron and sulphur can be separated by dissolving the mixture in?
  • A. steam
  • B. dilute hydrochloric acid
  • C. dilute sodium hydroxide
  • D. benzene
View Answer & Discuss (21) JAMB 1998
3

A given amount of gas occupies 10.0 dm3 at 4atm and 273°C. The number of moles of the gas present is?
(Molar volume of a gas at s.t.p. = 22.4 dm3)

  • A. 0.89 mol
  • B. 1.90 mol
  • C. 3.80 mol
  • D. 5.70 mol
View Answer & Discuss (21) JAMB 1998
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4
8.0 g of an element X react with an excess of copper (ll) tetraoxosulphate (lV) solution to deposit 21.3 g of copper. The correct equation for the reaction is?

(Cu = 64).
  • A. X(s) + CuSO4(aq) → Cu(s) + XSO4(aq)
  • B. X(s) + 2CuSO4(aq) → 2Cu(s) + X(SO4)2(aq)
  • C. 2X(s) + CuSO4(aq) → Cu(s) + X2SO4(aq)
  • D. 2X(s) + 3CuSO4(aq) → 3Cu(s) + X2(SO4)3(aq)
View Answer & Discuss (14) JAMB 1998
5
C3H8(g) + 502(g) → 4H2O + 3CO2(g). Form the equation above the volume of oxygen at s.t.p. required to burn 50cm3 of propane is?
  • A. 250 cm3
  • B. 150 cm3
  • C. 100 cm 3
  • D. 50 cm3
View Answer & Discuss (2) JAMB 1998
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