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Chemistry Past Questions

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1831
The product of the reaction between propanoic acid and ethanol is
  • A. prophlmethanoate
  • B. ethylethanoate
  • C. methylpropanoate
  • D. propylethanoate
  • E. ethylpropanoate
View Answer & Discuss WAEC 1992
1832
Which of the following groups contains entirely linear molecules?
  • A. H 2NH3O 2
  • B. CO2NH 3 2
  • C. H 2CH4N2
  • D. CO2H2N2
  • E. CH 4O 2CO 2
View Answer & Discuss (1) WAEC 1992
1833
What is the value of n in the following equation? XO-4 +8H + + ne- → X2 + + 4H2O
  • A. 2
  • B. 3
  • C. 4
  • D. 5
  • E. 6
View Answer & Discuss (13) WAEC 1992
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1834
A dye is suspected to have contaminated a lollipop. Which of the following is the best method by which the contaminant may be isolated?
  • A. Fractional distillational
  • B. Recrystallization
  • C. Filtration
  • D. Paper chromatography
  • E. Evaporation
View Answer & Discuss WAEC 1992
1835
Which of the following accounts for the difference in the mode of conduction of electricity by metals and aqueous salt solutions?
  • A. Electrons are present in metals but not in salt solutions
  • B. Metals are conductors while salts are electrolytes
  • C. Electricity is carried by mobile elrctrons in metals but by ions is aqueous salt solution
  • D. salts ionize in aqueous solutions while metals do not
  • E. Metals are reducing agents while salts are not
View Answer & Discuss (3) WAEC 1992
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