The table below gives some properties of three elements X,Y and Z.

The table below gives some properties of three elements X,Y and Z.

(a) Which element is in liquid form at room temperature? Give reason.
(b) Explain why the boiling point of element X is higher than that of element Z.

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a) Y-At room temperature (25⁰c) Y is a liquid since its M.P and B.P lie between -7^oc and 58.8⁰c OR(room temperature is between M.P and B.P.)
b) The molecular mass of x is higher than that of Z; the Vander Waals forces are stronger in X molecules than in Z molecules hence X has a higher boiling point than Z.

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sharon kalunda answered the question on March 26, 2019 at 12:56

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