Question

Which of the following compound is a gas (at 0⁰C) :

• A. BF3
• B. BCl3
• C. BBr3
• D. BI3

Answer 1

Answer: (A)

BF3

Answer 2

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 0⁰C.