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Tuesday, 19 May 2026
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Chemistry Past Questions and Answers

Chemistry Questions

Question 221:
JAMB 1981
In the reaction<br/>C + 2HNO<sub style='font-size: smaller;'>3</sub> → CO<sub style='font-size: smaller;'>2</sub> + NO<sub style='font-size: smaller;'>2</sub> + NO + H<sub style='font-size: smaller;'>2</sub>O nitric acid is acting as?
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  • A A reducing agent
  • B A nitrating agent
  • C An oxidizing agent
  • D A catalytic agent
  • E A neutralizing agent
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Question 222:
JAMB 1981
The brown coloration in nitric acid prepared in the laboratory can be removed by?
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  • A Heating the acid
  • B Bubbling air through the acid
  • C Cooling the acid
  • D Adding a decolorizing agent
  • E Adding a base
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Question 223:
JAMB 1981
Which of the following processes takes place during electrolysis?
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  • 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
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Question 224:
JAMB 1981
In the preparation of ammonia, which of the following is used as the drying agent?
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  • A CaO
  • B CaCI<sub style='font-size: smaller;'>2</sub>
  • C Conc. H<sub style='font-size: smaller;'>2</sub>SO<sub style='font-size: smaller;'>4</sub>
  • D P<sub style='font-size: smaller;'>2</sub>O<sub style='font-size: smaller;'>5</sub>
  • E H<sub style='font-size: smaller;'>3</sub>PO<sub style='font-size: smaller;'>4</sub>
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Question 225:
JAMB 1981
Which of the following can have an isomer?
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  • A C<sub style='font-size: smaller;'>2</sub>H<sub style='font-size: smaller;'>4</sub>
  • B C<sub style='font-size: smaller;'>4</sub>H<sub style='font-size: smaller;'>10</sub>
  • C C<sub style='font-size: smaller;'>3</sub>H<sub style='font-size: smaller;'>8</sub>
  • D C<sub style='font-size: smaller;'>2</sub>H<sub style='font-size: smaller;'>6</sub>
  • E C<sub style='font-size: smaller;'>6</sub>H<sub style='font-size: smaller;'>6</sub>
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