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Chemistry Past Questions

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1801
Methanol is obtained from wood by
  • A. esterification
  • B. bacterial decomposition
  • C. combustion
  • D. fractional distillation
  • E. destructive distillation
View Answer & Discuss WAEC 1992
1802

Study carefully the reaction represented by the equation below. 2H2O 2(l) → O 2(g) + 2H2O(l). Which of the following will not reaction increase the reaction rate?

  • A. Heating the hydrogen peroxide
  • B. Adding a pinch of MnO2 to the reactant
  • C. increasing the concentration of the H2O2
  • D. Adding water to the reactant
  • E. Exposing the reactant to sunlight
View Answer & Discuss (3) WAEC 1992
1803
Which of the following processes is a physical reaction?
  • A. Electrolysis
  • B. Hydrolysis
  • C. Allotropic change
  • D. Neutralization
  • E. Corrosion
View Answer & Discuss (2) WAEC 1992
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1804

If the volume of a given mass of gas at 298 K and pressure of 205.2 x 10\(^3\) Nm\(^{-2}\) is 2.12dm\(^3\), what is volume of the gas at s.t.p? (Standard pressure = 101.3 x 10\(^3\) Nm\(^{-2}\), Standard temperature = 273K)

  • A. 39.3dm 3
  • B. 22.4dm3
  • C. 4.93dm3
  • D. 3.93dm3
  • E. 0.393dm3
View Answer & Discuss (8) WAEC 1992
1805
The following acids are monobasic except
  • A. methanoic acid
  • B. dioxonitrate lll acid
  • C. ethanedioic acid
  • D. oxochlorate (l) acid
  • E. hydrobromic acid
View Answer & Discuss WAEC 1992
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