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Chemistry Past Questions

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1206
Magnesium ribbon was allowed to burn inside a given gas P leaving a white solid residue Q. Addition of water to Q liberated a gas which produced dense white fumes with a drop of hydrochloric acid. The gas P was?
  • A. nitrogen
  • B. chlorine
  • C. oxygen
  • D. sulphur (IV) oxide
View Answer & Discuss (22) JAMB 1987
1207

The best treatment for a student who accidentally poured concentrated tetraoxosulphate (VI) acid on his skin in the laboratory is to wash the skin with?

  • A. cold water
  • B. sodium hydroxide solution
  • C. iodine solution
  • D. sodium trioxocarbonate (IV) solution
View Answer & Discuss (62) JAMB 1987
1208
In which of the following pairs of element is allotropy exhibited by each element?
  • A. Phosphorus and hydrogen
  • B. Oxygen and chlorine
  • C. Sulphur and nitrogen
  • D. Oxygen and sulphur
View Answer & Discuss (14) JAMB 1987
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1209
Which of the following gases can best be used for demonstrating the fountain experiment?
i) Nitrogen (ii) Ammonia (iii) Nitrogen (I) oxide
(iv) Hydrogen chloride.
  • A. ii and iii
  • B. i and iii
  • C. ii and iv
  • D. ii only
View Answer & Discuss (7) JAMB 1987
1210
When sodium hydroxide is heated with ammonium tetraoxosulphate (IV), the gas given off may be collected by?
  • A. bubbling it through concentrated H2SO2
  • B. bubbling it through water and then passing it through calcium oxide
  • C. passing it directly through calcium oxide
  • D. passing it directly through calcium chloride
View Answer & Discuss (5) JAMB 1987
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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