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NEET • PHYSICS • THERMODYNAMICS
Thermodynamics practice · Mixed difficulty
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Showing 181-183 of 183 questions
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Medium
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Analyzing
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(A): A room can not be cooled by opening the door of a refrigerator in a closed room
(R): Heat flows from lower temperature (refrigerator) to higher temperature (room).
(R): Heat flows from lower temperature (refrigerator) to higher temperature (room).
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Correct option: A
Both (A) and (R) are true and (R) is the correct explanation of (A)
Option A is correct because the refrigerator transfers heat from its inside to the room, ultimately increasing the room's temperature, and this is due to heat flowing from a colder to a hotter region with external work.
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Medium
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Application
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Find amount of heat required to increase the temperature of of water by .
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Correct option: B
Option B (840 J) is correct because it is the amount of heat calculated using the specific heat capacity of water, the mass, and the temperature change.
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Medium
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Understanding
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Boiling water is changing into steam. At this stage then specific heat of water is
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Correct option: B
Option B () is correct because during a phase change (boiling), the temperature remains constant while heat is added, leading to an infinite specific heat.
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