which of the foll is not a Lewis acid .....
a) BF3
b)AlCl3
c)FeCl3
d)PH3
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Answer:
d)PH3 is a base not a lewis acid!
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explain...for BF3..
A Lewis acid can accept a pair of electrons from a Lewis base. The boron in BF3 is electron poor and has an empty orbital, so it can accept a pair of electrons, making it a Lewis acid. A Lewis acid is defined as an electron-pair acceptor. So for something to act as a Lewis acid, it needs to want electrons.
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