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Question

Which of the following fluoro-compounds is most likely to behave as a Lewis base?

A
CF4
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B
SiF4
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C
BF3
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D
PF3
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Solution

The correct option is D PF3
Lewis base is substance which contains lone pair on central atom.
PF3 acts as a Lewis base due to the presence of lone pair on phosphorous.
Hence, option D is correct.

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