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Chemistry Past Questions

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3386

Solubility curve can be used in the determination of the

  • A. amount of crystals formed
  • B. amount of solvent that can be recovered
  • C. amount of solid drugs in a given solution
  • D. temperature of the solution
View Answer & Discuss (6) WAEC 2017
3387

If 0.2g of a salt is required to saturate 200\(cm^{3}\) of water at room temperature, what is the solubility of the salt?

  • A. 0.2\(gdm^{-3}\)
  • B. 1.0\(gdm^{-3}\)
  • C. 2.0\(gdm^{-3}\)
  • D. 5.0\(gdm^{-3}\)
View Answer & Discuss WAEC 2017
3388

The property of a chemical reaction that is affected by the presence of a catalyst is

  • A. activation energy
  • B. free energy
  • C. equilibrium position
  • D. enthalpy change
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3389

Soluble salts can be prepared by the following methods except

  • A. neutralization
  • B. reaction of an acid with trioxocarbonate(IV) salt
  • C. double decomposition
  • D. reaction of an acid with electropositive metals
View Answer & Discuss (2) WAEC 2017
3390

Chemical reactions occurs when the colliding reactants have energy that is

  • A. less than the activation energy
  • B. greater than the activation energy
  • C. greater than the energy of the product
  • D. less than the energy of effective collision
View Answer & Discuss WAEC 2017
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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
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