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Byju's Answer
Standard XII
Physics
1st Law of Thermodynamics
A closed ther...
Question

A closed thermos flask is an example of

A
Open system
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B
Closed system
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C
Isolated system
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D
None of these
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Solution

The correct option is C Isolated system
An ideal thermos flask does not allow energy transfer with surroundings. Moreover, like any other closed container it also does not allow matter transfer.
∴ It is an isolated system.

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