p-Block elementsHard

Question

Which of the following compound is a gas (at 0oC) :

Options

A.BF3
B.BCl3
C.BBr3
D.BI3

Solution

There is least van der Waal′s force of attraction in BF3 on account of less number of polarisable electrons among the boron halides. So BF3 is gas at 0oC.

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