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Chemistry 1991 JAMB Past Questions

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16

The solubility of copper (II) tetraoxosulphate (Iv) is 75g in 100g of water at 100°C and 25g in 100g of water at 30°C. What mass of the salt would crystallize, if 50g of copper (II) tetraoxosulphate (VI) solution saturated at 100°C were cooled to 30°C ?

  • A. 57.5
  • B. 42.2
  • C. 28.6
  • D. 14.3
View Answer & Discuss (21) JAMB 1991
17

A sample of temporary hard water can be prepared in the laboratory by?

  • A. disolving calcium chloride in distilled water
  • B. saturating lime water with carbon (IV) oxide
  • C. saturating distilled water with calcium hydroxide
  • D. dissolving sodium hydrogen trioxocarbonate (IV) in some distilled water
View Answer & Discuss (8) JAMB 1991
18
A property of a colloidal dispersion which a solution does not have is?
  • A. the Tyndall effect
  • B. homogeneity
  • C. osmotic pressure
  • D. surface polarity
View Answer & Discuss (5) JAMB 1991
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19

50 cm\(^3\) of sulphur (IV) oxide, 800cm\(^3\) of ammonia, 450 cm\(^3\) of hydrogen chloride, 1.0 cm\(^3\)of Carbon(IV) oxide will respectively saturate 1.0 cm\(^3\) of water at 15°C. Which of the following is suitable for demonstrating the fountain experiment?

  • A. Sulphur (IV) oxide and hydrogen chloride
  • B. Carbon (IV) oxide and ammonia
  • C. Ammonia and hydrogen chloride
  • D. Carbon (IV) oxide and surphur (IV) oxide
View Answer & Discuss (6) JAMB 1991
20
How many structural isomers can be written for the alkyl bromide, C4H9Br?
  • A. 3
  • B. 4
  • C. 6
  • D. 8
View Answer & Discuss (15) JAMB 1991
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts