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526

Which of the following metals is purified commercially by electrolysis?

  • A. Zn
  • B. Fe
  • C. Sn
  • D. Cu
View Answer & Discuss (10) JAMB 2009
527
What current will deposit 3.25g of zinc in 2hrs?
[Zn = 65, F = 96500 mol-]
  • A. 3.25A
  • B. 2.00A
  • C. 1.34A
  • D. 0.67A
View Answer & Discuss (13) JAMB 2009
528

C(s) + H2O(g) → H2(g) + CO2(g)
ΔG for the reaction above at 1300k is -43KJ. At this temperature, the reaction is?

  • A. not feasible
  • B. at equilibrium
  • C. feasible
  • D. exothermic
View Answer & Discuss (12) JAMB 2009
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529

Two equal bulbs, one containing ammonia and the other nitrogen are opened mouth - to - mouth to each other at room temperature. The entropy in the mixture of gases is likely to?

  • A. remain unchange
  • B. increase
  • C. decrease
  • D. change
View Answer & Discuss (9) JAMB 2009
530

In the diagram above, which of the curves represents the evolution of oxygen with time in the equation 2KClO3(s) → 2KCl(s) + 3O2(g)?

  • A. X
  • B. Y
  • C. Z
  • D. R
View Answer & Discuss (12) JAMB 2009
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts