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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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Understanding
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Absorption of gasses on solid surface is generally exothermic because
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Correct option: B
Entropy decreases
Option B (Entropy decreases) is correct because when gases are adsorbed onto a solid surface, their freedom of movement is restricted, leading to a decrease in entropy.
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The internal energy of one mole of a gas is:
An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If is the initial temperature and is the final temperature, which of the following statements is correct?
For which of the process, ∆S is negative?
The work done by a weightless piston in causing an expansion ∆V (at constant temperature), when the opposing pressure, P is variable, is given by:
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Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is
Reason :- During phase transition work done is always negative. For the reaction, at . Hence, is