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Chemistry 2014 WAEC Past Questions

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16
If 0.20 mol dm-3 NaOH(aq) was evaporated to yield 5.0g of solid NaOH, calculate the volume of NaOH (aq) used. (Na = 23.0,O = 16:0; H = 1.00)
  • A. 600cm-3
  • B. 625cm3
  • C. 10003
  • D. 1600 cm 3
View Answer & Discuss (2) WAEC 2014
17

The mass of 800cm3 of gas Q at s.t.p. is 1.0g. What is the molar mass of Q? [Avogadros constant = 22.4dm3 mol-1`]

  • A. 18.0 gmol-1
  • B. 22,4gmol-1
  • C. 28.0gmol-1
  • D. 36.0 gmol-1
View Answer & Discuss (1) WAEC 2014
18
Which of the following statements about a chemical system in equilibrium is correct/ The
  • A. reaction is irreversible
  • B. reaction goes to completion
  • C. equilibrium is re-established when a stress is applied
  • D. equilibrium position is affected by catalyst
View Answer & Discuss WAEC 2014
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19
Which of the following relationships correctly expresses the Boyle's law?
  • A. P \(\alpha\) V at constant T
  • B. V \(\alpha\) T at constant P
  • C. P \(\alpha\) \(\frac{1}{V}\) at constant T
  • D. V \(\alpha\) \(\frac{1}{T}\) at constant P
View Answer & Discuss WAEC 2014
20
The vapour pressure of a given volume of liquid increase when the
  • A. liquid becomes saturated with a salt
  • B. Volume of the liquid increases
  • C. temperature of the liquid falls
  • D. temperature of the Liquid rises
View Answer & Discuss WAEC 2014
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