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Chemistry Past Questions

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1731

What is the voltage of the cell represented at Zn(s)/ Zn\(^{2+}\)(aq) //Cu\(^{2+}\)(aq) /Cu(s) given that for Cu\(^{2+}\)(aq)/ Cu (s) E\(^0\) = 0.337V and for Zn\(^{2+}\)(aq) /Zn(s)' E\(^0\) = - 0.763V?

  • A. +0.426V
  • B. -0.426V
  • C. -0.337V
  • D. -1.10V
  • E. +1.10V
View Answer & Discuss (6) WAEC 1989
1732
Catalytic hydrogenation of oils results in the production of
  • A. soaps
  • B. detergents
  • C. alkanes
  • D. butter
  • E. margarine
View Answer & Discuss (4) WAEC 1990
1733

Which of the following reaction will not take place under normal conditions?

  • A. Zn(s) + 2HCl → ZnCI2(aq) + H 2(g)
  • B. Fe (s) + H 2SO4(aq) → FeSO4(aq) + H2(g)
  • C. Cu (s) + 2HCI (aq) → CuCI 2(aq) + H2(g)
  • D. Ca(s) + 2H 2O (1) → Ca(OH)2(g) + H2(g)
  • E. 2Na(s) + 2H 2O (1) → 2NaOH(aq) + H2(g)
View Answer & Discuss (5) WAEC 1990
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
1734
A sample of orange juice is suspected to have been contaminated with a yellow dye. Which of the following methods can be used to detect the dye?
  • A. Decantation
  • B. Chromatography
  • C. Distillation
  • D. Filtration
  • E. Evaporation
View Answer & Discuss (2) WAEC 1990
1735
The electronic configuration 1s2 22s 22p 63s23p 6 is that of a
  • A. noble gas
  • B. Group ll element
  • C. Group lll element
  • D. Group V element
  • E. Group VI element
View Answer & Discuss (3) WAEC 1990
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