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Chemistry 2008 JAMB Past Questions

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21

Insoluble salts can be prepared by?

  • A. titrating an alkali against an appropriate acid
  • B. reacting an acid with trioxocarbonate (IV) salt
  • C. directing combination of the elements which make up the salt
  • D. mixing two soluble compounds containing the metallic radical and the acidic radical
View Answer & Discuss (29) JAMB 2008
22

The oxidation state of carbon in HCOOH is

  • A. -1
  • B. +2
  • C. +3
  • D. zero
View Answer & Discuss (4) JAMB 2008
23

What is the IUPAC nomenclature of the compound NaCIO?

  • A. sodium oxochlorate (I)
  • B. sodium chloro (I) oxide
  • C. sodium monooxochlorate (II)
  • D. sodium chloro (I) monoxide
View Answer & Discuss (1) JAMB 2008
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24

In recharging a lead-acid accumulator, the reaction at the cathode can be represented as

  • A. Pb2+(aq) + SO2-4(aq) →PbSO4(s)
  • B. Pb2+(aq) + 2e- →Pb(s)
  • C. Pb2+(aq) + 2H2O(l) → PbO2(s) + 4H+(aq) + 4e-
  • D. Pb(s) → Pb2+(aq) + 2e-
View Answer & Discuss (31) JAMB 2008
25

If a given quantity of electricity liberates 0.65g of Zn2+, what amount of Hg2+ would be liberated by the same quantity of current?
[Zn = 65, Hg = 201]

  • A. 1.00g
  • B. 2.01g
  • C. 4.02g
  • D. 8.04g
View Answer & Discuss (11) JAMB 2008
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