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Chemistry 2018 JAMB Past Questions

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51

What mass of Cu would be produced by the cathodic reduction of Cu\(^{2+}\)  when 1.60A of current passes through a solution of CuSO\(_4\) for 1 hour. (F=96500Cmol\(^{-1}\) , Cu=64)

  • A. 7.64g
  • B. 3.82g
  • C. 1.91g
  • D. 0.96g
View Answer & Discuss (2) JAMB 2018
52

Calculate the pH of 0.05 moldm\(^{-3}\) H\(_2\)SO\(_4\)

  • A. 1.30
  • B. 1.12
  • C. 1.00
  • D. 0.30
View Answer & Discuss (2) JAMB 2018
53

The choice of method for extracting a metal from its ores depends on the

  • A. strength of the core
  • B. position of the metal in the electrochemical series
  • C. source of the core
  • D. position of the metal in the periodic table
View Answer & Discuss JAMB 2018
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54

Which of the following produces relatively few ions in solution?

  • A. NaOH
  • B. Ca(OH)\(_2\)
  • C. KOH
  • D. AI(OH)\(_3\)
View Answer & Discuss JAMB 2018
55

The figure above shows the electrolysis of molten sodium chloride. Z is the

  • A. anode where the Cl\(^-\) ions are oxidized
  • B. cathode where the Cl\(^-\) ions are reduced
  • C. anode where the Na\(^+\) ions are reduced
  • D. cathode where the Na\(^+\) ions are oxidized
View Answer & Discuss (1) JAMB 2018
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