When does a non-ideal solution is said to show a negative deviation?

1.	When does a non-ideal solution is said to show a negative deviation?
Answer» Solution :The escaping tendency of A and B will be lower when compared with an IDEAL solution formed by A and B.Hence ,the vapour pressure of such solution will belower than the sum of the vapour pressure of A and B . This type of deviation is called NEGATIVE deviation . For. the negative deviation ` P_A lt P_A^(@) X_A and P_B lt P_B^(@) X_B `

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