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Which of the following is not correct?

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a
G is zero for a reversible reaction 
b
G  is positive for a spontaneous reaction 
c
G  is negative for a spontaneous reaction 
d
G  is positive for a non-spontaneous reaction

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detailed solution

Correct option is B

The sign on G  must be negative for there to be a spontaneous reaction.

Entropy, temperature, and Gibbs free energy are related. There will always be a spontaneous reaction when H is negative and S is positive.

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