A) \[\Delta H\]is + ve;\[\Delta S\]is also + ve
B) \[\Delta H\]is\[-ve\];\[\Delta S\]is, also\[-ve\]
C) \[\Delta H\]is\[-ve\];\[\Delta S\]is +ve
D) \[\Delta H\]is + ve;\[\Delta S\]is\[-ve\]
Correct Answer: D
Solution :
When\[\Delta G\]is +ve, then reaction is not possible. \[\Delta G=\Delta H-T.\Delta S\] If\[\Delta H=+\text{ }ve\] and\[\Delta S=+\text{ }ve,\]then \[\Delta G=+ve\] only when\[\Delta H>T.\Delta S\] and if\[\Delta H=+\text{ }ve\]and\[\Delta S=-\text{ }ve,\]then \[\Delta G=+\text{ }ve.\]
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