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Chemistry WAEC Past Questions

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511

If a metal R forms a compound with the formula R(NO3)2 the formula of its tetraoxosulphate (VI) is

  • A. R(SO4)2
  • B. RSO4
  • C. R2SO4
  • D. R2(SO4)3
View Answer & Discuss WAEC 2001
512

Which of the following decreases when a given mass of gas is compressed to half its initial volume?

  • A. Average intermolecular distance
  • B. Frequency of collisions
  • C. Number of molecules present
  • D. Atomic radius of each particle
View Answer & Discuss (4) WAEC 2001
513
What volume of hydrogen will be produced if 100cm3 of ammonia is completely decomposed at constant temperature and pressure? The equation for the reaction is 2NH3(g) → N2(g) + 3H2(g)
  • A. 50cm3
  • B. 150cm3
  • C. 200cm3
  • D. 300cm3
View Answer & Discuss (3) WAEC 2001
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514

The gas given off when NH4Cl is heated with an alkali is

  • A. H2
  • B. CI2
  • C. N 2
  • D. NH 3
View Answer & Discuss (2) WAEC 2001
515

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 (2) WAEC 2001
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