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Chemistry WAEC Past Questions

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926

Which of the following acids would readily react with CaCO3 to liberate CO2?

  • A. CH3COOH
  • B. H2SO4
  • C. H2SO3
  • D. HNO3
View Answer & Discuss (4) WAEC 2013
927
Which of the following compounds crystallizes without water of crystallization?
  • A. MgSO4
  • B. Na2CO3
  • C. NaCI
  • D. FeSO4
View Answer & Discuss (1) WAEC 2013
928
A substance is said to be impure if
  • A. its melting point range is wide
  • B. it dissolves in water with difficult
  • C. it has a low melting point
  • D. it is coloured
View Answer & Discuss (3) WAEC 2013
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929
The following factors affect the solubility of a solid in a given solvent except
  • A. nature of solute
  • B. nature of solvent
  • C. pressure
  • D. temperature
View Answer & Discuss WAEC 2013
930

Consider the reaction represented by the equation: N\(_2\)O\(_4\)(g) ⇌ 2NO\(_2\)(g) ; ∆H = + x kJmol-1
What happens when the temperature is reduced at equilibrium?

  • A. Concentration of N 2O4(g) decreases
  • B. Concentration of N 2O4(g) increases.
  • C. Pressure exerted by the gases increases
  • D. Pressure exerted by the gases remains constant
View Answer & Discuss (5) WAEC 2013
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