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Chemistry WAEC Past Questions

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121
Esterification of propane 1,2,3-triol and unsaturated higher carboxylic acids will produce
  • A. fats
  • B. soap
  • C. methly-propanoate
  • D. alkanols
  • E. oils
View Answer & Discuss (17) WAEC 1991
122
The ratio of reactants to products is 1: 3: 2 in the reaction represented by the equation below: N2,/SUB> (g) → 2NH3(g) which of the following law is demonstrated by this?
  • A. Boyle's law
  • B. Law of multiple proportion
  • C. Gay Lussac's law
  • D. Law of constant composition
  • E. Avogadro's law
View Answer & Discuss (1) WAEC 1991
123
In the redox reaction represented by the following equation: Cu2+aq + Zn(s) → Cu(s) + Zn2+
  • A. the oxidation number of copper increases
  • B. copper (ll) ions are reduced to copper atoms
  • C. zinc atoms are reduced to zinc ions
  • D. copper (ll) ions donate electrons to zinc atoms
View Answer & Discuss (2) WAEC 1991
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124
When starch undergoes complete enzyme-catalyzed hydrolysis, the resulting product is
  • A. glucose
  • B. maltose
  • C. sucrose
  • D. fructose
  • E. cellulose
View Answer & Discuss (2) WAEC 1991
125
Which of the reactions represented by the following equations will take place at room temperature?
  • A. C 6 H2O → CO + H2
  • B. CuO + H2 → Cu + H2O
  • C. N2 + 3H2 → 2NH3
  • D. 2Na + 2H2O → 2NaOH + H2
  • E. 2Fe + 3CI2 → 2FeCI3
View Answer & Discuss (4) WAEC 1991
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