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Chemistry WAEC Past Questions

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1111
Which of the following substances is a non-electrolyte?
  • A. H2SO4
  • B. CH3COOH
  • C. C6H12O6
  • D. NH4Cl
View Answer & Discuss (4) WAEC 2016
1112
The oxidation number of sulphur is +4 in
  • A. Na2S>2O3
  • B. H2SO3
  • C. H2SO4
  • D. SO3
View Answer & Discuss (2) WAEC 2016
1113

Consider the following ionic equation:
Cr\(_2\)O\(_7\)\(^{2-}\) + 14H\(^+\) + ne-  → 2Cr\(^{3+}\) + 7H\(_2\)O.
The value of n in the equation is_______?

  • A. 7
  • B. 6
  • C. 3
  • D. 2
View Answer & Discuss (12) WAEC 2016
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1114
Consider the following half-cell reactions.
Al(s) \(\to\) Al3+(aq) + 3e-
Cu2+(aq) + 2e- \(\to\) Cu(s)

The overall equation for the reaction is
  • A. Al(s) + Cu2+(aq) \(\to\) Al3+(aq) + Cu(s)
  • B. 2Al(s) + Cu2+(aq) \(\to\) 2Al(aq) + Cu(s)
  • C. 2Al(s) + 3Cu2+(aq) \(\to\) 3Cu(s) + 2Al3+(aq)
  • D. 3Al(s) + 2Cu2+(aq) \(\to\) Cu(s) + 3Al3+(aq)
View Answer & Discuss (1) WAEC 2016
1115
Amino acids are obtained from proteins by
  • A. Hydrolysis
  • B. Oxidation
  • C. Polymerization
  • D. Reduction
View Answer & Discuss (2) WAEC 2016
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