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Chemistry JAMB Past Questions

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481

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
482

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
483

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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484

\(NH_{3(g)} + HCl_{(g)} → NH_4Cl_{(s)}\)
The entropy change in the system above is

  • A. positive
  • B. zero
  • C. negative
  • D. indeterminate
View Answer & Discuss (13) JAMB 2008
485

Which of the following reaction is endothermic?

  • A. C(s) + O2(g) → CO2(g)
  • B. CaO(s) + H2O(l) → Ca(OH)2(s)
  • C. C(s) + H2O(g) → CO(g) + H2(g)
  • D. HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)
View Answer & Discuss (13) JAMB 2008
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