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# Which of the following species has two non-bonded electron pairs on the central atom?

$\begin{array}{1 1}(a)\;TeCl_4&(b)\; ClF_3\\(c)\;PCl_3&(d)\;ICl_2^-\end{array}$

In $TeCl_4$ out of 6 electrons:bonded electrons are 4,non-bonded electron pair is 1.
In $ClF_3$ out of 7 electrons:bonded electrons are 3,non-bonded electron pairs are 2.
In $PCl_3$ out of 5 electrons:bonded electrons are 3,non-bonded electron pair is 1.
In $ICl_2^-$ out of (7+1=8) electrons:bonded electrons are 2,non-bonded electron pairs are 3.
Hence (b) is the correct answer.