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Chemistry 1989 JAMB Past Questions

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41

In the above set up substances X and Y are respectively

  • A. lime water copper (ll) tetraoxosulphate (lV)
  • B. potassium trioxocarbonate and alkaline pyrogallol
  • C. potassium hydroxide and alkaline pyrogallol
  • D. potassium trioxocarbonate (lV) and concentrated tetraoxosulphate (IV) acid
View Answer & Discuss (19) JAMB 1989
42
Which of the curves in the above graph illustrates the behaviour of an ideal gas?
  • A. W
  • B. X
  • C. Y
  • D. Z
View Answer & Discuss (2) JAMB 1989
43

The above diagram gives the potential energy profile of the catalyst and uncatalysed reactions of X(g) + Y(g) → XY(g). Deduce the respective activation energies in KJ of the catalysed and uncatalysed reverse reactions: XY(g) → X(g) + Y(g)

  • A. 300, 500
  • B. 500, 300
  • C. -300, -500
  • D. -500, -300
View Answer & Discuss (22) JAMB 1989
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44

If in the graph above 1 dm 3 of a saturated solution of KCL is cooled from 80°C, the mass of crystals deposited will be
[K = 39, Cl = 35.5]

  • A. 7.45 g
  • B. 14.90 g
  • C. 74.50 g
  • D. 149.00 g
View Answer & Discuss (21) JAMB 1989
45

The above graph shows a typical heating curve from the solid phase through the liquid phase to the gaseous phase of a substance. Which part of the curve shows solid and liquid in equilibrium?

  • A. T
  • B. U
  • C. X
  • D. Y
View Answer & Discuss (6) JAMB 1989
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