Properties of materials

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Question 12
Medium

An investigation is carried out to classify four different unknown samples (1, 2, 3, and 4) as elements, compounds, or mixtures based on their physical and chemical properties:

  • Substance 1: A solid with a sharp melting point at 114∘C114^\circ\text{C}114∘C. When heated, it sublimes to form a purple vapour containing only one type of atom.
  • Substance 2: A liquid that boils over a temperature range of 110∘C110^\circ\text{C}110∘C to 125∘C125^\circ\text{C}125∘C and can be separated into distinct fractions by fractional distillation.
  • Substance 3: A solid that does not conduct electricity but, when molten, conducts electricity and decomposes via electrolysis to yield two different pure substances.
  • Substance 4: A lustrous solid that conducts electricity in both the solid and liquid states, and cannot be simplified further by any chemical reaction.

Which option correctly classifies these four substances?

Substance 1: Compound; Substance 2: Mixture; Substance 3: Compound; Substance 4: Element

Substance 1: Element; Substance 2: Compound; Substance 3: Mixture; Substance 4: Element

Substance 1: Element; Substance 2: Mixture; Substance 3: Compound; Substance 4: Element

Substance 1: Mixture; Substance 2: Mixture; Substance 3: Compound; Substance 4: Compound

Properties of materials Questions

  1. GCSE
  2. /Chemistry
  3. /Properties of materials