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Chemistry 2013 WAEC Past Questions

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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21

The percentage by mass of calcium in Ca(OCI)2 is [Ca = 40.0; CI = 35.5; O = 16.0]

  • A. 28.0%
  • B. 31.6%
  • C. 43.8%
  • D. 44.5%
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22
The gas law which describes the relationship between volume and temperature is
  • A. Boyle's law
  • B. Charles' law
  • C. Dalton's law
  • D. Graham's law
View Answer & Discuss (2) WAEC 2013
23
Which of the following phenomenna lead to decrease in volume of a liquid in an open container?
  • A. Brownian motion
  • B. Diffusion
  • C. Evaporation
  • D. Sublimation
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
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24
The pressure exerted by a gas is a function of the
  • A. total volume of the gas
  • B. speed of the gaseous molecules
  • C. mass of each gaseous molecule
  • D. frequency of collision between gaseous molecules
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25
Which of the following gases are arranged in increasing order of diffusion rate? [H = 1 .0; C = 12; N = 14; O = 16; S = 32]
  • A. SO 2 O2, NH3 H2
  • B. H2S,NH2,O2,SO2
  • C. CO2,N2O,O2,SO2
  • D. NH3,NO2,N2,CO2
View Answer & Discuss (4) WAEC 2013
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