From the following options : (A) Oxidation state of Br in ( Br ₃ O ₈ ) is (+10 / 3 ) (B) Oxidation state of C in ( C ₃ O ₂ ) is +1 (C) Oxidation state of ( S _ in S ₄ O ₆ ²⁻ ) is +2.5 (D) Oxidation state of H in metal hydrides is -1 (E) Oxidation state of P in ( P ₄ ) is (-1 / 4 ) The correct option is:

Step-by-step solution

Let's analyze each option: - (A): Oxidation state of Br in ( Br ₃ O ₈ ) is not (+10 / 3 ). The oxidation states of Br in ( Br ₃ O ₈ ) are +6 and +4 (not fractional). - (B): Oxidation state of C in ( C ₃ O ₂ ) (carbon suboxide) is not +1. It is +2. - (C): The oxidation state of S in ( S ₄ O ₆ ²⁻ ) is +2.5. This is correct. - (D): In metal hydrides, the oxidation state of H is -1. This is correct. - (E): The oxidation state of P in ( P ₄ ) is O, not (-1 / 4 ). This is incorrect. Thus, C and D are correct.