Identify the correct statements from the following. (i) Oxygen shows -2,-1,+1 and +2 oxidation states. (ii) The thermal stability of H ₂ O , H ₂ Se and H ₂ ~S follows the order H ₂ O < H ₂ ~S < H ₂ Se. (iii) The reducing nature of H ₂ Se , H ₂ ~S and H ₂ Te follows the order H ₂ ~S < H ₂ Se < H ₂ Te

Step-by-step solution

Oxygen shows -2,-1,+1 and +2 oxidation states. (i) Oxygen shows -2 oxidation states in most of its compound while it shows ( - 1) O.S. in peroxides (like H ₂ O ₂ ), +1 in O ₂ ~F ₂ and +2 in OF ₂ . Thus, it show -2,-1,+1 and +2 oxidation states. (ii) The thermal stability of H ₂ O , H ₂ Se and H ₂ ~S follows the order H ₂ O > H ₂ ~S > H ₂ Se This is because, on going down the group, the size of the central atom increases and therefore, its tendency to form stable covalent bond with hydrogen decreases. As a result, t