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Chemistry JAMB Past Questions

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1771

When copper (ii) sulphate solution is treated with excess ammonium hydroxide, a precipitate is first formed, and then this dissolves to give a deep blue solution.

This deep blue solution is a?

  • A. Cu(OH)2
  • B. CuSo4.5H2O
  • C. (NH4)2SO4
  • D. Cu(NH3)4(OH)2
  • E. CuSO4.(NH4)2SO4.2H2O
View Answer & Discuss (10) JAMB 1980
1772

Which of the following derivatives of nitrogen affords an aqueous solution having a pH of less that 7?

  • A. N2O
  • B. NO
  • C. NO2
  • D. NaNO3
  • E. NH3
View Answer & Discuss (8) JAMB 1980
1773
Detergents are more advantageous than soaps in hard water districts because
  • A. on treatment with hard water they either form soluble calcium salts or do not react with calcium ion
  • B. on treatment with hard water they form soluble calcium salts
  • C. on treatment with hard water they form sodium salts
  • D. on treatment with hard water they are converted into soaps
  • E. on treatment with hard water they form more lather than soaps does
View Answer & Discuss (13) JAMB 1980
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1774
Which of the following classes of organic compounds undergoes rapid oxidation with bromine water?
  • A. alcohols
  • B. alkenes
  • C. carboxylic acids
  • D. esters
  • E. alkanes
View Answer & Discuss (1) JAMB 1980
1775
An endothermic reaction is one during which heat is.....and can be represented by the symbol.... which of the following combinations can be used accurately to complete the above definition?
  • A. liberated, -\(\Delta\)H
  • B. liberated, +\(\Delta\)H
  • C. absorbed, -\(\Delta\)H
  • D. absorbed, +\(\Delta\)H
  • E. absorbed, +\(\Delta\)G
View Answer & Discuss (6) JAMB 1980
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