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Arrange the following molecules in incre...

Arrange the following molecules in increasing order of number of lone pair of electrons. `H_(2)O,PCl_(3),H_(2)O,BF_(3)`

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Verified by Experts

Considering the lone pair of the central atom:
`BF_(3)(0 lp) lt PCl_(3)(1 lp) lt H_(2)O(2lp)`
Considering the lone pairs of all the atoms present in the
molecule: `H_(2)O lt BF_(3) lt PC l_(3)`.
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