A) If \[\Delta {{G}_{system}}=0,\] the system has attained equilibrium
B) If \[\Delta {{G}_{system}}=0,\] the system is still moving in a particular direction
C) If \[\Delta {{G}_{system}}<0,\] the process is not spontaneous
D) If \[\Delta {{G}_{system}}>0,\] the process is not spontaneous
Correct Answer: A
Solution :
If \[\Delta {{G}_{system}}=0\] the system has attained equilibrium is right choice. In it alternative [d] is most confusing as when \[\Delta G>0,\]the process may be spontaneous when it is coupled with a reaction which has \[\Delta G<0\] and total \[\Delta G\] is negative, so right answer is [a].
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