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Chemistry Past Questions

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1351
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
1352

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
1353

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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1354
One of the following techniques can be used to show that chlorophyll pigment is a mixture of chemical compounds and not a single coloured compound
  • A. cystallization
  • B. hydrolysis
  • C. sublimation
  • D. filtration
  • E. chromatography
View Answer & Discuss (1) JAMB 1979
1355

A gas occupies a volume of 30.0 dm\(^3\) at S.T.P. What volume would it occupy at 91\(^0\)C and 380 mm Hg?

  • A. 20. 0dm3
  • B. 40.0dm3
  • C. 60. 0dm3
  • D. 80. 0dm3
  • E. 100. 0dm3
View Answer & Discuss (16) JAMB 1979
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