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Give two conditions for the positive dev...

Give two conditions for the positive deviation of non-ideal solutions.

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(i) A-B interactions are smaller than A-A and B- -B interactions.
(ii) `P_(A) gt P_(A)^(0) x_(A) , P_(B) gt P_(B)^(0) x_(B)`.
(iii) `Delta H_("mixing ") gt 0 ` OR positive or + ve
(iv) `Delta V_("mixing") gt 0 ` OR positive or + ve
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