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Chemistry 1986 JAMB Past Questions

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36

What mass of a divalent metal M (atomic mass = 40) would react with excess hydrochloric acid to liberate 224cm^3 dry hydrogen gas measured at S.T.P?

  • A. 8.0 g
  • B. 4.0 g
  • C. 0.8 g
  • D. 0.4 g
View Answer & Discuss (34) JAMB 1986
37

In the solubility curve above, water at 98\(^0\)C is saturated with KCl and KCIO\(_3\). What is the percentage of KCl impurity in the crystals formed when the solution is cooled to 30\(^0\)C?

  • A. 51.5
  • B. 45.5
  • C. 34.5
  • D. 26.5
View Answer & Discuss (21) JAMB 1986
38
In the electrolysis of aqueous solution of K2SO 4 in the above cell, which species migrate to the anode?
  • A. SO2-OH -
  • B. K + and SO 4 2-
  • C. OH and HO
  • D. H3O + and K
View Answer & Discuss (2) JAMB 1986
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39
The tabulated results below were obtained by titration 10.0 cm3 of water with soup. The titration was repeated with the same sample of water after boiling. The ratio of permanent to temporary hardness is
  • A. 1.5
  • B. 1.4
  • C. 4.1
  • D. 5.1
View Answer & Discuss (21) JAMB 1986
40

Use the options above to answer this question. Which is the structural formula for pent-2-enoic acid?

  • A. A
  • B. B
  • C. C
  • D. D
View Answer & Discuss (3) JAMB 1986
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