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Chemistry 2005 JAMB Past Questions

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6

2H\(_2\) + O\(_2\) → 2H\(_2\)O    ΔH = - 571kJ
In the equation above, how much heat will be liberated if 12.0g of hydrogen is burnt in excess oxygen?

  • A. -1142 kJ
  • B. -571 kJ
  • C. +1142 kJ
  • D. -1713 kJ
View Answer & Discuss (9) JAMB 2005
7

A concentrated solution containing H\(^+\), Cu\(^{2+}\), OH\(^-\) and Cl\(^-\) was electrolyzed using platinum electrodes.
The ion that will be discharged at the cathode is?

  • A. Cu2+
  • B. Cl-
  • C. H+
  • D. OH-
View Answer & Discuss (24) JAMB 2005
8

When sulphur (IV) oxide is passed into a solution of sodium hydroxide for a long time, it eventually produces a solution of

  • A. NaHSO4
  • B. Na2SO3
  • C. NaHSO3
  • D. Na2SO4
View Answer & Discuss (30) JAMB 2005
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9

What is the correct IUPAC name for NO\(_{2} ^{-}\)?

  • A. Dioxonitrate (IV) ion
  • B. Trioxonitrate (III) ion
  • C. Trioxonitrate (IV) ion
  • D. Dioxonitrate (III) ion
View Answer & Discuss (24) JAMB 2005
10

What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrates (V)?

  • A. The spoon will be oxidized while the iron (II) ions will be reduced to the metal
  • B. The spoon will increase in size
  • C. The spoon will be reduced while the iron (II) ions will be oxidized
  • D. The spoon will be reduced
View Answer & Discuss (11) JAMB 2005
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