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Question

In the structure of ClF3, the number of lone pairs of electrons on central atom Cl is:

A
One
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B
Two
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C
Four
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D
Three
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Solution

The correct option is B Two
In ClF3,
The central atom is chlorine.
The number of valence electrons in chlorine is 7.
Each fluorine atom will share one electron.
So total number of valence electrons around the central chlorine atom would be =7+3=10
Thus total number of valence electron pairs around C atom =102=5
Total number of bond pairs=3
So total number of lone pairs=53=2

The structure of ClF3 is


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