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Materials : Metals and Non-Metals — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceMaterials : Metals and Non-Metals1 Mark
MCQ
Identify the true statement from the following.
  • A
    Metals have fixed melting points whereas non$-$metals do not.
  • B
    All metals are malleable.
  • ✓
    The hardest substance known is a non$-$metal.
  • D
    Tungsten is a bad conductor of heat and electricity.
✓

Answer

Correct option: C.
The hardest substance known is a non$-$metal.
The hardest substance known is diamond. Diamond is an allotrope of carbon i.e., a non$-$metal.

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