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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
1
Medium
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Analyzing
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Assertion : An exothermic process which is nonspontaneous at high temperature may become spontaneous at a low temperature.
Reason : There occurs a decrease in entropy factor as the temperature is decreased.
Reason : There occurs a decrease in entropy factor as the temperature is decreased.
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Correct option: B
Assertion is correct, reason is correct; reason is not a correct explanation for assertion
Option B (Assertion is correct, reason is correct; reason is not a correct explanation for assertion) is correct because both the assertion and reason are true, but the reason doesn't directly explain why the assertion is true.
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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:
Assertion :- At constant pressure of the change work done is negative.
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