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Chemistry 2001 WAEC Past Questions

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21
Which of the following substances decomposes when an electric current is passed through it?
  • A. Glucose solution
  • B. Zinc rod
  • C. Hydrochloric acid
  • D. Tetrachlormethane
View Answer & Discuss WAEC 2001
22
A concentrated solution containing H+, Cu2+,OH- and CI- was electrolysed using platiunm electrodes which of the ions will be discharged at the cathods?
  • A. H+
  • B. Cu2+
  • C. OH-
  • D. CI-
View Answer & Discuss WAEC 2001
23
Given that the order of reactivity of four metals is P>Q>R>S, which of the following reactions is feasible?
  • A. S + P+ → P + S +
  • B. Q + S+ → S + Q+
  • C. R + P+ → P + R+
  • D. S + Q+ → Q + S+
View Answer & Discuss (11) WAEC 2001
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24
In the electrolysis of CuSO4(aq) using copper electrodes, the reaction at the anode is
  • A. discharge of SOsub>4 2-
  • B. discharge of OH-
  • C. dissolution of copper electrode
  • D. evolution of oxygen
View Answer & Discuss (1) WAEC 2001
25

A feasible cell was constructed by joining the two half cells below. Cu2+ (aq) + 2e- → Cu(s) Eo = - 0.76 V. What is the standard e.m.f. of the cell?

  • A. - 1.1V
  • B. - 0.42V
  • C. +0.42V
  • D. +1.1V
View Answer & Discuss (4) WAEC 2001
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