Question

# Which of the following are non-polar?

A
SiF4
B
XeF4
C
SF4
D
BF3

Solution

## The correct options are A $$SiF_4$$ B $$XeF_4$$ D $$BF_3$$$$XeF_4$$ has two lone pairs on $$Xe$$ (two lone pairs on opposite cancel the dipoles)and is nonpolar.Even though in $$SF_4$$ all the four $$F$$ atoms dipoles are cancelled by each other there is a lone pair on $$S$$ , hence it is polar.$$SiF_4$$,$$XeF_4$$,$$BF_3$$all the dipoles are cancelled each other, so non-polar.Hence options A,B & D are correct.Chemistry

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