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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
Solution
Verified by Toppr

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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