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Chemistry Past Questions

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1001
Which of the following statements is NOT true of electrovalent compounds?
  • A. They are solids
  • B. They do not vaporized easily
  • C. They usually dissolve in water
  • D. The elements forming the compounds normally have their valency electrons in a shared state
  • E. They conduct electricity
View Answer & Discuss (2) JAMB 1981
1002
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
1003
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
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1004

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
1005

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
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