MCQ
Elements of group $-15$ form compounds in $+5$ oxidation state. However, bismuth forms only one well characterised compound in $+5$ oxidation state. The compound is
  • A
    $\ce{Bi_2O_5}$
  • $\ce{BiF_5}$
  • C
    $\ce{BiCl_5}$
  • D
    $\ce{Bi_2S_5}$

Answer

Correct option: B.
$\ce{BiF_5}$
Stability of $+5$ state decreases from top to bottom but because of high electronegativity and smaller size of fluorine bismuth can exist in this form.

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