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Which one of the following is NOT a heterogeneous mixture?

Options

  1. ASulphur in carbon disulphide
  2. BMixture of sugar and salt crystals
  3. CSandy water
  4. DSulphur in water

Correct answer

A. Sulphur in carbon disulphide

Step-by-step solution

Sulphur is a non-polar solid and carbon disulphide ( CS₂ ) is a non-polar solvent. According to the principle of like dissolves like, sulphur dissolves completely in carbon disulphide to form a true solution. A true solution is a homogeneous mixture, not a heterogeneous mixture. Mixture of sugar and salt crystals, sandy water, and sulphur in water do not form true solutions and are heterogeneous mixtures. Answer: Sulphur in carbon disulphide

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