Question

The halogen $($Group $17$ elements$)$:

• A. have an electron configuration of a noble gas less seven electrons
• B. are highly electro positive
• C. show variable oxidation state of $-1,+1,+3,+5$ and $+7$ in their various compounds
• D. forms a volatile, covalent hydrides $HX$ in which the halogen $\left(X\right)$ shows an oxidation state of $+1$

Answer 1

The correct option is C show variable oxidation state of $-1,+1,+3,+5$ and $+7$ in their various compounds

Fluorine is the most electronegative in halogen family so it has oxidation number of -1 in all its compounds but Cl,Br and I are less electronegative so these elements prepare compounds with oxidation number of +1,+3,+5 and +7.