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Q.

Given below are two statements: One is labeled as Assertion A and the other is labeled as Reason R. 
Assertion A: If dQ and dW represent the heat supplied to the system and the work done on the system respectively.  The according to the first law of thermodynamics dQ=dUdW
Reason R : First law of thermodynamics is based on law of conservation of energy.
In the light of the above statements, choose the correct answer from the options give below.

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a

Both A and R are correct and R is the correct explanation of A

b

A is correct but R is not correct

c

Both A and R are correct but R is not the correct explanation of A

d

A is not correct but R is correc

answer is D.

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Detailed Solution

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Negative sign in work comes as work is done on system. Both A and R are correct and R is the correct explanation of A

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