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Chemistry 2002 WAEC Past Questions

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21
What volume of hydrogen will be produced if 100cm3 of ammonia is completely decomposed at constant temperature and pressure? The equation for reaction is 2NH3(g) → N2(g) + 3H2(g)
  • A. 50cm3
  • B. 150cm3
  • C. 200cm3
  • D. 300cm3
View Answer & Discuss (1) WAEC 2002
22

Calculate the mass of chlorine gas which occupies a volume of 1.12 dm\(^3\) a volume of 1.12 dm\(^3\) at s.t.p [Cl = 35.5, 1 mole og gas occupies 22.4 dm\(^3\) at s. t. p ]

  • A. 1.80g
  • B. 3.55g
  • C. 7.10g
  • D. 15.50g
View Answer & Discuss (9) WAEC 2002
23

Determine the mass of sulphur (IV) oxide obtained when 91.0g of oxygen reacts completely with sulphur according to the following equation: S(s) + O\(_2\)(g) → SO\(_2\)(g) [S = 32; O = 16]

  • A. 123g
  • B. 139g
  • C. 155g
  • D. 182g
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24
The gas given off when NH4 Cl is heated with an alkali is
  • A. H2
  • B. Cl2
  • C. N2
  • D. NH3
View Answer & Discuss (2) WAEC 2002
25
A major factor considered in selecting a suitable method for preparing a simple salt is its
  • A. crystalline form
  • B. melting point
  • C. reactivity with dilute acids
  • D. solubility in water
View Answer & Discuss (1) WAEC 2002
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