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  • 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 (i) Bi_{2}O_{5} (ii) BiF_{5} (iii) BiCl_{5} (iv) Bi_{2}S_{5}

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

(i) Bi_{2}O_{5}

(ii) BiF_{5}

(iii) BiCl_{5}

(iv) Bi_{2}S_{5}

Answers (1)

The answer is the option (ii). Due to inert pair effect, bismuth generally exhibits +3 oxidation state. However, due to the small size and high electronegativity of the fluoride ion it forms the compound BiF_{3}.

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