Question

why bicl5 is strong redcing agent
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Answer 1

Answer:

what is your question mate I'm not able to understand

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Answer 2

Answer:

In BiCl3, due to the much electronegativity difference between Bi and Cl, Chlorine atom forms bonds with almost pure p orbitals of Bi, and the lone pairs on Bi are of almost pure s character.

Thus, Bi atom doesn't actually utilise much of its s orbital electrons in forming the bonds which is energetically much more preferable. ( If it seems non-obvious, recall Bent's rule which says that more electronegative atoms prefer to form bonds with orbitals with more p - character.)

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