Quiz: UPPSC Prelims 2019 (GS Paper I)
Category: UP PSC (PCS)
Question 123 of 149
UPPSC Prelims 2019 (GS Paper I)
82%
A liquid remains hot or cold for a long time in thermos flask because there is no loss or gain of heat by:
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23 Aug 2025
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18 Oct 2025
This MCQ is part of the UP PSC Previous Year Questions (PYQs) series, focusing on UPPSC Prelims 2019 (GS Paper I)