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Chemistry WAEC Past Questions

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516

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
517

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 (11) WAEC 2001
518

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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519

Calculate the mass of sodium hydroxide in 5.00 dm3 of a 0.125 mol dm-3 solution [NaOH = 40 g mol]

  • A. 0.0156 g
  • B. 0.625 g
  • C. 1.00 g
  • D. 25. 0 g
View Answer & Discuss (5) WAEC 2001
520

Which of the following salt solutions will have a pH greater than 7?

  • A. NaCl(aq)
  • B. Na2CO3(aq)
  • C. Na2SO4(aq)
  • D. NaHSO4(aq)
View Answer & Discuss WAEC 2001
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