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Hello,
according to NEET chapter wise weightage, which is of 3% and the sub topics from thermodynamics concept are as follows
First Law of Thermodynamics, Work, Internal Engery, - 45% and Thermodynamics process, Reversible and Irresversible process, second law of thermodynamics - 22% and finally Refrigerator( heat pump) , Heat Engine - 33%
Revert back in comment section if you have any doubts regarding this.
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