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Chemistry 2021 WAEC Past Questions

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46

Which of the following pairs of molecules form hydrogen bonds?

  • A. C\(_{2}\)H\(_{5}\)OH and CH\(_{3}\)OH
  • B. CH\(_{3}\)OH and H\(_{2}\)
  • C. H\(_{2}\)S and CH\(_{4}\)
  • D. NH\(_{3}\) and SO\(_{2}\)
View Answer & Discuss (2) WAEC 2021
47

Which of the following statements about elements in Group VII is correct?

  • A. Br\(_{2}\) will oxidize CI\(^{-}\)
  • B. F\(_{2}\) has the least tendency to be reduced
  • C. Cl\(_{2}\) will oxidize I\(^{-}\)
  • D. l\(_{2}\) is a stronger oxidizing agent than F\(_{2}\)
View Answer & Discuss (9) WAEC 2021
48

Electrovalent compounds normally ------------

  • A. have low boiling points
  • B. have mobile electrons
  • C. conduct electricity in the solid state
  • D. dissolve in polar solvent
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49

A coordinate covalent bond could be formed between?

  • A. NH\(_{3}\) and PCl\(_{3}\)
  • B. BCl\(_{3}\) and AlCl\(_{3}\)
  • C. BCl\(_{3}\) and NH\(_{3}\)
  • D. H\(^{+}\) and AlCl\(_{3}\)
View Answer & Discuss (1) WAEC 2021
50

Which of the following scientists discovered the electrons?

  • A. Joseph J. Thompson
  • B. James Chadwick
  • C. Amedeo Avogadro
  • D. Ernest Rutherford
View Answer & Discuss WAEC 2021
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