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Chemistry WAEC Past Questions

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1851

Which of the following statements about an equilibrium system is correct?

  • A. Forward and backward reactions occur at the same rate
  • B. The concentrations of reactants must equal that of the products
  • C. The concentrations of, reactants and products can be changed by adding a catalyst,
  • D. The concentrations of reactants and products are not affected by a change in temperature
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1852

Consider the following reaction equation
N\(_{2}\)(g) + 3H\(_{2(g)}\)  ⇌ 2NH3(g) ∆H = -92kJ

Increasing the temperature of the reaction would

  • A. shift the equilibrium to the right
  • B. increase the yield of ammonia
  • C. decrease the amount of hydrogen
  • D. decrease the yield of ammonia
View Answer & Discuss (7) WAEC 2022
1853

When air in a syringe is compressed such that there is no change in temperature, the

  • A. air liquefies
  • B. pressure increases
  • C. intermolecular space increases
  • D. density decreases
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1854

Which of the following statements about liquids is/are true?


I. Liquids maintain their volume at constant temperature.
II. Liquids have fixed shape
III. Liquids do not diffuse
IV. Change in pressure affects volume of liquids

  • A. I only
  • B. IV only
  • C. I and IV only
  • D. II and III only
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1855

A hydrogen chloride gas reacted with oxygen gas to yield water and chlorine gas. The mole ratio of the hydrogen chloride gas to water is

  • A. 1:3
  • B. 2:1
  • C. 3:1
  • D. 4:1
View Answer & Discuss (3) WAEC 2022
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