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421

Copper and silver metals are commonly used as coin because they are

  • A. easily reduced
  • B. not easily reduced
  • C. easily oxidized
  • D. not easily oxidized
View Answer & Discuss (6) JAMB 2007
422

Which of the following sets of metals dissolves in dilute HCl?

  • A. Fe, Sn and Cu
  • B. Mg, Fe and Cu
  • C. Mg, Sn and Fe
  • D. Cu, Mg and Sn
View Answer & Discuss (8) JAMB 2007
423

If chlorine is bubbled into water and the resulting yellowish-green solution is exposed to bright sunlight for a while, the solution will decompose giving out

  • A. oxygen and leaving behind aqueous hydrochloric acid
  • B. chlorine and oxygen
  • C. oxygen, hydrogen and chlorine
  • D. oxygen, thereby producing hypochlorous acid
View Answer & Discuss (5) JAMB 2007
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424

H\(_3\)PO\(_4\)(aq) + H\(_2\)O(l) ↔ H\(_2\)PO\(^{4-}\)(aq) + H\(_3\)O\(^+\)(aq)    ΔH = -13kJ at 298K
In the reaction above, an increase in temperature would

  • A. slow down the reverse reaction
  • B. have no effect on the reaction
  • C. favour the reverse reaction
  • D. favour the forward reaction
View Answer & Discuss (1) JAMB 2007
425

The reaction that takes place in Daniell's cell is 

  • A. direct combination
  • B. redox
  • C. double decomposition
  • D. neutralization
View Answer & Discuss (3) JAMB 2007
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts