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Chemistry WAEC Past Questions

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1046

The gas given off when NH4 Cl is heated with an alkali is

  • A. H2
  • B. Cl2
  • C. N2
  • D. NH3
View Answer & Discuss (4) WAEC 2002
1047
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
1048

Which of following acids forms normal salts only?

  • A. Tetraoxosulphate (VI) acid
  • B. Trioxosulphate (IV) acid
  • C. Acetic acid
  • D. Tetraoxophosphate (V) acid
View Answer & Discuss (13) WAEC 2002
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1049
A substance is said to be hygroscopic if it absorbs
  • A. water from the atmosphere to form a solution
  • B. heat from the surrounding
  • C. carbon (IV) oxide from the atmosphere
  • D. moisture from the atmosphere without dissolving
View Answer & Discuss (3) WAEC 2002
1050
Which of the following substances increases in mass when heated in air?
  • A. Sodium chloride
  • B. lodine crystals
  • C. Magnesium ribbon
  • D. Copper (ll) oxide
View Answer & Discuss (1) WAEC 2002
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