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Chemistry 1993 JAMB 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
26
An experiment produces a gaseous mixtures of carbon (IV) oxide and carbon (II) oxide. In order to obtain pure carbon (II) oxide, the gas mixture should be?
  • A. passed over heated copper (II) oxide
  • B. bubbled through concentrated tetraoxosulphate (IV) acid
  • C. bubbled through sodium hydroxide solution
  • D. bubbled through water
View Answer & Discuss (7) JAMB 1993
27
Which of the following is a property of ionic chlorides?
  • A. They can be decomposed by heat
  • B. They react with aqueous AgNO3 to give a white precipiate which is soluble in excess ammonia
  • C. They explode when in contact with dry ammonia
  • D. They react with concentrated tetraoxosulphate (IV) acid to give white fumes of chlorine gas
View Answer & Discuss (7) JAMB 1993
28
When dilute aqueous solutions of lead (II) nitrate and potassium bromide are mixed, a precipitate is observed.
The products of this reaction are?
  • A. PbO(s) + Br- + KNO3
  • B. Br2 + NO2(g) + PbBr2(s)
  • C. PbO(s) + K+(aq) + Br(aq) + NO2(g)
  • D. PbBr2(s) + K(aq) + K+(aq) + NO3(aq)
View Answer & Discuss (7) JAMB 1993
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29
Bronze is an alloy of?
  • A. silver and copper
  • B. silver and gold
  • C. copper and nickle
  • D. copper and zinc
  • E. copper and tin
View Answer & Discuss (6) JAMB 1993
30
The active reducing agent in the blast furnace for the extraction of iron is?
  • A. carbon
  • B. limestone
  • C. carbon(II)oxide
  • D. calcium oxide
View Answer & Discuss (1) JAMB 1993
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