Question

A thermos flask is polished well

A

To make attractive

B

For shining

C

To absorb all radiations from outside

D

To reflect all radiations from outside

Medium

Solution

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Correct option is
D

To reflect all radiations from outside

The polished surface reflects all the radiation. And a thermos flask is used to keep the heat out so the well-polished surface reflects all radiation from outside.

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