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Chemistry WAEC Past Questions

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1846

Consider the following reaction equation:
CaO + SiO\(_{2}\) ------> CaSiO\(_{3}\)
Silicon(IV) oxide is acting as

  • A. a basic oxide
  • B. a reducing agent
  • C. an acidic oxide
  • D. an oxidizing agent
View Answer & Discuss (1) WAEC 2022
1847

Which of the following acids would form normal salt only?

  • A. Tetraoxosulphate(VI) acid
  • B. Trioxonitrate(V) acid
  • C. Tetraoxophosphate(V) acid
  • D. Trioxosulphate(IV) acid
View Answer & Discuss (11) WAEC 2022
1848

What is the partial pressure of oxygen at s.t.p. in a gaseous mixture containing 100 cm3 of oxygen and 900 cm3 of nitrogen gas?

  • A. 1.0 atm
  • B. 0.1 atm
  • C. 9.0 atm
  • D. 0.9 atm
View Answer & Discuss (2) WAEC 2022
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1849

Graphite is used as a dry lubricant due to the presence of

  • A. mobile electrons
  • B. free electrons
  • C. octahedral structures
  • D. layered structures
View Answer & Discuss WAEC 2022
1850

Which of the following gases is alkaline?

  • A. NO\(_{2}\)
  • B. CO\(_{2}\)
  • C. NH\(_{3}\)
  • D. N\(_{2}\)O
View Answer & Discuss WAEC 2022
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