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NEET UG CHEMISTRY MCQ: THERMODYNAMICS
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Medium
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Analyzing
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Given are two statements one is labelled as Assertion A and other is labelled as Reason R.
Assertion A: Magnesium can reduce at a temperature below , while above aluminium can reduce .
Reason R: The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements, choose most appropriate answer from the options given below:
Assertion A: Magnesium can reduce at a temperature below , while above aluminium can reduce .
Reason R: The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements, choose most appropriate answer from the options given below:
View answer and explanation
Correct option: B
Both A and R are correct, but R is NOT the correct explanation of A.
Option B is correct because both the assertion and the reason are true, but the reason does not explain the assertion. The Ellingham diagram explains the assertion.
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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