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Chemistry Past Questions

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2451
A solution that contains as much solute as it can dissolve at a given temperature is said to be
  • A. concentrated
  • B. saturated
  • C. supersaturated
  • D. unsaturated
View Answer & Discuss WAEC 2009
2452
Which of the following salts is insoluble in water?
  • A. Pb (NO3)2
  • B. Na 2CO3
  • C. AgNO3
  • D. AgCI.
View Answer & Discuss (6) WAEC 2009
2453
Which of the following statement is correct? The solubility of
  • A. gases increases with increase in temperature
  • B. gases decreases with increase in temperature
  • C. most solid solutes decreases with indease in temperature
  • D. most solid solutes is constant
View Answer & Discuss WAEC 2009
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2454
A catalyst increases the rate of chemical reaction by
  • A. decreasing the temperature of the reaction
  • B. decreasing the activation energy of the reaction
  • C. increasing the surface area of the reactants
  • D. decreasing the surface area of the products
View Answer & Discuss (1) WAEC 2009
2455
Which of the following factors will affect the rate of the reaction represented by the equation? 2HCI(aq) + CaCO 3(s) → CaCI2(aq) + H2O (I) + CO2(g) l. Pressure ll. Concentration III. Nature of reactants IV. Temperature
  • A. l and ll only
  • B. ll, lll and IV only
  • C. l, ll and lll only
  • D. l, ll, lll and IV
View Answer & Discuss (5) WAEC 2009
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