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Chemistry 1984 JAMB Past Questions

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36
Which of the following electrodes is used in electrolysis of bauxite (Al2O3) in molten cryolite?
  • A. Steel electrodes
  • B. Carbon electrodes
  • C. Mercury electrodes
  • D. Carbon anode and steel cathode
  • E. Carbon cathode and stell anode
View Answer & Discuss (1) JAMB 1984
37
An aqueous solution of a metal salt, M, gives a white precipitate with NaOH which dissolves in excess NaOH. With aqueous ammonia, the solution of M also gives a white precipitate which dissolves in excess ammonia. Therefore cartion in M is
  • A. Zn ++
  • B. Ca++
  • C. Ai+++
  • D. Pb++
  • E. Cu++
View Answer & Discuss (4) JAMB 1984
38

At S. T. P how many litres of hydrogen can be obtained from the reaction of 500 cm\(^3\) of 0.5 M H\(_2\)SO\(_4\) with excess zinc metal?
(Gram molecular volume of H\(_2\) = 22.4 dm\(^3\))

  • A. 22.4 dm 3
  • B. 11 . 2 dm 3
  • C. 6. 5 dm 3
  • D. 5. 6 dm 3
  • E. 0. 00 dm 3
View Answer & Discuss (9) JAMB 1984
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39
The solubility curves of four substances are shown in the figure above. Which of the four substances would crystallize from a saturated solution cooled from 353K(80oC)to 323K(50C)?
  • A. P and Q
  • B. P and R
  • C. P and S
  • D. R and S
  • E. Q and R
View Answer & Discuss (4) JAMB 1984
40
Which of the curves shown in the figure given represents the relationships between the volume(V) and pressure(P) of an ideal gas at constant temperature
  • A. 1
  • B. 2
  • C. 3
  • D. 4
  • E. 1 and 3
View Answer & Discuss (12) JAMB 1984
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