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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals1 Mark
MCQ
Electrical wires have a coating of an insulating uctivity material. The material, generally used is :
  • A
    Sulphur.
  • B
    Graphite.
  • ✓
    $\ce{PVC}.$
  • D
    All can be used.
✓

Answer

Correct option: C.
$\ce{PVC}.$
$\ce{PVC}$ is a polymer and bad conductor of electricity. It is used as insulating material for covering electric wires. Graphite is good conductor of electricity, so cannot be used as insulating material. Sulphur, which is a non-metal although non $-$ conductor of electricity but brittle in nature. So, cannot be used as insulating material.

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