Q.

Why are plastics poor conductors of heat and electricity?

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a

Plastics are not good insulators, so they cannot conduct heat or electricity

b

Plastics have low density, so they cannot conduct heat or electricity

c

Plastics have low high resistance to the flow of heat or electricity

d

Plastics have high resistance to the flow of heat or electricity

answer is B.

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Detailed Solution

  •  Plastics are poor conductors of heat and electricity because they have high resistance to the flow of heat or electricity.
  • This is because plastics are made of long-chain polymers that do not have free electrons like metals. 
  • As a result, the electrons cannot move freely through the material, and the heat or electricity cannot be conducted efficiently.
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Why are plastics poor conductors of heat and electricity?