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Chemistry Past Questions

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3096
Chemical equilibrium is attained when
  • A. All the reactants have been completely used up
  • B. The reaction goes to completion
  • C. The concentration of reactants and products remain constant
  • D. The concentration of reactants and products are equal
View Answer & Discuss (10) WAEC 2016
3097

Which of the following factors will affect the rate of the reaction represented by the following equation?
2HCl(aq) + CaCO3(s) \(\rightarrow\) CaCl2(aq) + H2O(1) + CO2(g)

I. Pressure
II.Concentration
III. Nature of reactants
IV. Temperature

  • A. I and II only
  • B. II, III and IV only
  • C. I, II and III only
  • D. I, II. III and IV
View Answer & Discuss (9) WAEC 2016
3098

On evaporation to dryness, 350cm\(^3\) of saturated solution of salt Z gave 55.5g of salt. What is the solubility of the salt? [Z = 101]

  • A. 1.57 moldm-3
  • B. 3.14 moldm-3
  • C. 6.28 moldm-3
  • D. 12.56 moldm-3
View Answer & Discuss (2) WAEC 2016
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3099
Which of the following salts when dissolved in water will form a solution that will change blue litmus to red?
  • A. CH3COONa
  • B. NH4Cl
  • C. NaCl
  • D. KCl
View Answer & Discuss (10) WAEC 2016
3100
Which of the following bonds are broken when ethanol is boiled?

I. Covalent bonds
II. Ionic bonds
III. Hydrogen bonds
  • A. I only
  • B. II only
  • C. III only
  • D. I, II, III
View Answer & Discuss (2) WAEC 2016
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