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Chemistry 1979 JAMB Past Questions

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36
Hydrogenation may be effected by
  • A. the removal of hydrogen from an alkane in the presence of a catalyst
  • B. the addition of hydrogen to an alkane in the presence of a catalyst
  • C. the addition of hydrogen to an alkyne
  • D. the removal of hydrogen from an alkyne
  • E. the addition of hydrogen to an ethyl alcohol
View Answer & Discuss (20) JAMB 1979
37
Two metallic ions associated with hard water are
  • A. copper and zinc
  • B. magnesium and silver
  • C. calcium and magnesium
  • D. potassium and tin
  • E. sodium and lead
View Answer & Discuss (2) JAMB 1979
38
Bronze is an alloy of
  • A. copper, zinc and nickel
  • B. aluminium and copper
  • C. copper and zinc
  • D. tin and zinc
  • E. tin and copper
View Answer & Discuss (6) JAMB 1979
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39

Phosphorus burns in oxygen according to the equation P\(_4\) + 5 0\(_2\) → P\(_4\)O\(_{10}\). How many litres of oxygen will be required at S.T.P for complete oxidation of 12.4g of phosphorus? [P = 31,O = 16 and molar volume of a gas at S.T.P = 22.4 litres]

  • A. 5. 20
  • B. 11. 20
  • C. 2. 24
  • D. 20. 20
  • E. 6. 20
View Answer & Discuss (13) JAMB 1979
40

On heating anhydrous iron (ll) sulphate, in addition to producing iron (iii) oxide, which of the following is produced?

  • A. SO2 (g) + FeS (s)
  • B. SO3 (g) +FeS(s)
  • C. SO2 (g) + SO3(g)
  • D. SO2 (g) + H2S (g)
  • E. SO3(g) + H2S(g)
View Answer & Discuss (10) JAMB 1979
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