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Chemistry WAEC Past Questions

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1586

consider the following reaction equation: 2NH\(_3 \) .+ 3Cl\(_2\) → N2 + 6HCl. 

NH\(_3\) is acting as?

  • A. a reducing agent
  • B. a dehydrating agent
  • C. a drying agent
  • D. an oxidizing agent
View Answer & Discuss WAEC 2019
1587

The oxidation of chromium in Cr\(_2\)O\(_7\)\(^{2-}\) ?

  • A. +4
  • B. +5
  • C. +6
  • D. +7
View Answer & Discuss (1) WAEC 2019
1588

The process by which alkanoic acid reacts reversibly with alkanols is known as?

  • A. saponification
  • B. esterification
  • C. carboxylation
  • D. halogenation
View Answer & Discuss (1) WAEC 2019
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1589

If the oxidation potential of Mg and Al are +2.37 volts and + 1.66 volts respectively, then the Mg would?

  • A. not replace Al
  • B. be replaced by Al
  • C. remain in the solution
  • D. replace Al
View Answer & Discuss (2) WAEC 2019
1590

consider the reaction represented by the following equation: 2SO\(_2\) + O\(_2\)  ⇌ 2SO\(_3\) 

A decrease in the pressure of the reaction would

  • A. decrease in the concentration of SO\(_2\)
  • B. have no effect on the reaction
  • C. shift the equilibrium position to the left
  • D. shift the equilibrium position to the right
View Answer & Discuss WAEC 2019
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