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Chemistry Past Questions and Answers

Chemistry Questions

Question 476:
JAMB 1986
What reaction takes place when palm-oil is added to potash and foam are observed?
SchoolNGR Classroom
  • A Neutralization
  • B Saponification
  • C Esterification
  • D Salting-out
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Question 477:
JAMB 1986
When ethanol is heated with excess concentrated sulphuric acid, the ethanol is?
SchoolNGR Classroom
  • A Oxidized to ethene
  • B Polymerized to polyethene
  • C Dehydrated to ethene
  • D Dehydrated to ethyne
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Question 478:
JAMB 1986
Which of the following compounds is NOT formed by the action of chlorine on methane?
SchoolNGR Classroom
  • A CH<sub style='font-size: smaller;'>3</sub>CI
  • B C<sub style='font-size: smaller;'>2</sub>H<sub style='font-size: smaller;'>5</sub>CI
  • C CH<sub style='font-size: smaller;'>2</sub>CI<sub style='font-size: smaller;'>2</sub>
  • D CHCI<sub style='font-size: smaller;'>3</sub>
View Answer & Explanation
Question 479:
JAMB 1986
Which of the following substance is a mixture?
SchoolNGR Classroom
  • A Granulated sugar
  • B Sea-water
  • C Sodium chloride
  • D Iron fillings
View Answer & Explanation
Question 480:
JAMB 1986
The general formula of an alkyl halide (where X represents the halide) is?
SchoolNGR Classroom
  • A C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub><sub style='font-size: smaller;'>2</sub>X
  • B C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub> + <sub style='font-size: smaller;'>1</sub>X
  • C C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub> + <sub style='font-size: smaller;'>2</sub>X
  • D C<sub style='font-size: smaller;'>n</sub>H<sub style='font-size: smaller;'>2n</sub>X
View Answer & Explanation

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