Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Chemistry 1991 WAEC Past Questions

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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1
The metal extracted from cassiterite is
  • A. calcium
  • B. copper
  • C. tin
  • D. sodium
  • E. lead
View Answer & Discuss WAEC 1991
2
In which of the following is the oxidation number of nitrogen zero?
  • A. SO2 and NH3
  • B. NaNO3
  • C. HNO2
  • D. NOI3
  • E. N2
View Answer & Discuss (2) WAEC 1991
3
The separation of a mixture of calcium trioxocarbonate (lV) and sodium trioxocarbonate (IV) is most easily carried out by using the differences in their
  • A. physical states
  • B. melting points
  • C. Rf. values
  • D. solubility
  • E. boiling points
View Answer & Discuss (6) WAEC 1991
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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4
When air is passed through a heated tube containing finely divided copper, the component that is absorbed in the process is
  • A. carbon (IV) oxide
  • B. nitrogen
  • C. oxygen
  • D. water vapour
  • E. noble gases
View Answer & Discuss (2) WAEC 1991
5
What is the amount (in mole) of sodium trioxocarbonate (IV) in 5.3 g of the compound? (Na2CO3 = 106)
  • A. 0.05
  • B. 0.10
  • C. 0.20
  • D. 0.50
  • E. 2.00
View Answer & Discuss (3) WAEC 1991
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