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Chemistry JAMB Past Questions

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1001
If concentrated sulphric acid is added to sugar and warmed gently, the sugar changes from white to brown and finally to a black mas of carbon. In this reaction, concentrated sulphuric acid is acting as ?
  • A. a drying agent
  • B. an oxidizing agent
  • C. a dehydrated agent
  • D. a reducing agent
  • E. a hydrolysing agent
View Answer & Discuss (8) JAMB 1981
1002
In the reaction
C + 2HNO3 → CO2 + NO2 + NO + H2O nitric acid is acting as?
  • A. a reducing agent
  • B. a nitrating agent
  • C. an oxidizing agent
  • D. a catalytic agent
  • E. a neutralizing agent
View Answer & Discuss (1) JAMB 1981
1003

The brown coloration in nitric acid prepared in the laboratory can be removed by?

  • A. heating the acid
  • B. bubbling air through the acid
  • C. cooling the acid
  • D. adding a decolorizing agent
  • E. adding a base
View Answer & Discuss (12) JAMB 1981
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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1004

Which of the following processes takes place during electrolysis?

  • A. Positive ions are discharged at the anode bby gaining sufficient electrons to become neutral
  • B. Negative ions are dicharged at the anode by gaining suficient electrons to become neutral
  • C. Positive ions are discharged at the anode by losing sufficient electrons to become neutral
  • D. Negative ions are discharge at the anode by losing sufficient electrons to become neutral
  • E. Nothing happens
View Answer & Discuss (12) JAMB 1981
1005
In the preparation of ammonia, which of the following is used as the drying agent?
  • A. CaO
  • B. CaCI2
  • C. Conc. H2SO4
  • D. P2O5
  • E. H3PO4
View Answer & Discuss (10) JAMB 1981
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