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In the structure of $ClF_3$, the number of lone pair of electrons on central atom 'Cl' is
Explanation
$ClF_3$ is $sp^3d$ with 3 bond pairs and 2 lone pairs (T-shaped).
Detailed Solution
Cl has 7 valence electrons; 3 are used in bonding with F, leaving 4 electrons = 2 lone pairs.
The number of lone pairs of electrons on central Cl is 2.
The number of lone pairs of electrons on central Cl is 2.