A) + 6, + 4, + 2, -2
B) + 7, + 5, + 3, + 1, - 1
C) +7, + 6, + 5, + 3, +2, -2
D) + 7, + 5, + 4, + 3, + 2, - 2
Correct Answer: B
Solution :
The correct combination of oxidation states for group 17 elements are + 7, + 5, + 3, + 1, - 1. When a halogen atom combines with an element of lesser electronegativity it shows - 1 oxidation state. On the other hand, when it combines with an element having higher electronegativity, it exhibits + 1 oxidation state. However, F being most electronegative always shows -1 oxidation state. Other elements show + 3, + 5 and + 7 oxidation states also due to the presence to vacant d-orbitals in their valence shell.
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