Which one of the following is not correct for an ideal solution? (a) It must obey Raoult's law (...

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Which one of the following is not correct for an ideal solution?
(a) It must obey Raoult's law
(b) \( \Delta H=0 \)
(c) \( \Delta H=\Delta V \neq 0 \)
(d) All are correct
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