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1186

Consider the following equilibrium reaction: \(2AB_{{2}{(g)}} + B_{{2}{(g)}} \to 2AB_{{3}{(g)}}\). \(\Delta H= -X kJmol^{-1}\). The backward reaction will be favored by

  • A. a decrease in pressure
  • B. an increase in pressure
  • C. a decrease in temperature
  • D. an introduction of a positive catalyst
View Answer & Discuss (2) WAEC 2018
1187

What is the mass of solute in 500\(cm^{3}\) of 0.005\(moldm^{-3}\) \(H_{2}SO_{4}\)? ( H = 1, S = 32.0, O=16.0)

  • A. 0.490g
  • B. 0.049g
  • C. 0.245g
  • D. 0.0245g
View Answer & Discuss (13) WAEC 2018
1188

Pure water can be made to boil at a temperature lower than 100°C by

  • A. reducing its quantity
  • B. decreasing the external pressure
  • C. distilling it
  • D. increasing the external pressure
View Answer & Discuss WAEC 2018
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1189

At what temperature does the solubility of \(KNO_{3}\)  equal that of \(NaNO_{3}\)?   

  • A. 0°C
  • B. 20°C
  • C. 30°C
  • D. 40°C
View Answer & Discuss WAEC 2018
1190

When a salt is added to its saturated solution, the salt

  • A. dissolves and the solution becomes super saturated
  • B. dissolves and the solution becomes unsaturated
  • C. precipitates and the solution remains unchanged
  • D. dissolves and crystals are formed
View Answer & Discuss (1) WAEC 2018
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