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Chemistry 2001 WAEC Past Questions

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41

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
42

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
43

Which of the following acids forms normal salts only?

  • A. Tetraoxosulphate (VI) acid
  • B. Trioxosulphate (IV) acid
  • C. Tetraoxophosphate (V) acid
  • D. Trioxonitrate (V) acid
View Answer & Discuss (2) WAEC 2001
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44

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 (9) WAEC 2001
45

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 (3) WAEC 2001
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