Chemistry 0620 · IGCSE · Elements, compounds and mixtures

Elements, compounds and mixtures — practice question

Details for four substances, W, X, Y and Z, are given below. W, X, Y and Z are graphite, poly(ethene), sodium chloride and silicon(IV) oxide, although these are not listed in the correct order. Identify W, X, Y and Z.

  • AW: graphite, X: poly(ethene), Y: silicon(IV) oxide, Z: sodium chloride
  • BW: sodium chloride, X: graphite, Y: poly(ethene), Z: silicon(IV) oxide
  • CW: poly(ethene), X: sodium chloride, Y: graphite, Z: silicon(IV) oxide
  • DW: silicon(IV) oxide, X: graphite, Y: poly(ethene), Z: sodium chloride

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