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(C) From the graph,at a constant vapour pressure,the temperature required for liquid $Z$ is the highest,followed by $Y$,and then $X$. This indicates t

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$(B)$

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(C) From the graph,at a constant vapour pressure,the temperature required for liquid $Z$ is the highest,followed by $Y$,and then $X$. This indicates that the boiling point order is $Z > Y > X$.Liquids with higher boiling points have stronger intermolecular forces of attraction.Therefore,the order of intermolecular interactions is $Z > Y > X$.Evaluating the inferences:$(A)$ $X$ has higher intermolecular interactions compared to $Y$: Incorrect,as $X$ has lower interactions than $Y$.$(B)$ $X$ has lower intermolecular interactions compared to $Y$: Correct.$(C)$ $Z$ has lower intermolecular interactions compared to $Y$: Incorrect,as $Z$ has higher interactions than $Y$.Thus,only inference $(B)$ is correct.

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