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JEE PHYSICS MCQ: THERMODYNAMICS
1
Medium
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Understanding
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Assertion: In a thermo flask, inner surface is shiny.
Reason: Shiny surface is poor radiator of heat.
Reason: Shiny surface is poor radiator of heat.
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Correct option: A
If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion
Option A (If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion) is correct because a shiny surface is a poor radiator of heat, which helps to minimize heat loss in a thermos flask.
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