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Question

Substances which do not allow heat to easily pass through them are known as

A
Conductors
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B
Insulators
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C
Semi Conductors
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D
None
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Solution

The correct option is B Insulators
Substances which don't allow heat to easily pass through them are known as insulators. Insulators have crystal structure of molecules, molecules are far from each other, compared to conductors. Hence they cannot pass the heat easily through them, besides this insulators don't have free electrons to pass heat more quickly.

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