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Aditi Krishana posted an Question
September 08, 2020 • 15:01 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Pbcl2 is stable but pbcl4 is unstable explain why
pbcl2 is stable but pbcl4 is unstable. explain why?
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Amol ashok pawar![best-answer]()
Elements of d-block and f-block have poor shielding effect due to inert pair effect. As Pb (lead) has four valence electrons in its outermost shell as 2 electrons are held in s-orbital and other two are held in p-orbital. So, due to contraction in d-block elements, electrons present in s-orbital are held more tightly in upper elements of the same group. Hence, s-orbital electrons become inert in nature and they are not easily removed. As a result, Pb will attain a charge of +2 by losing only two electrons and it does not lose 4 electrons. That is why, pbcl2 is stable and pbcl4 is not stable enough.