Identify the correct statements from the following. (i) The number of hydrogen bonded water molecules in copper sulphate pentahydrate is one. (ii) Lanthanum and zirconium form non-stoichiometric hydrides. (iii) In solid form of H ₂ O , each oxygen is surrounded by six oxygen in octahedral positions at a distance of 276 pm .

Step-by-step solution

Both (i) and (ii) statements are correct. The number of hydrogen bonded water molecules in copper sulphate pentahydrate is one Water of crystallisation [ Cu ( H ₂ O )₄ ] SO ₄ H ₂ O lanthanum and zirconium form non-stoichiometric hydrides. Some hydrides are LaH ₂, LaH ₃, ZrH ₂ . All hydrides are non-stoichiometric with variable composition, e.g. ZrH _x(1.30 x 1.75) . Most of these hydrides are good conductors of electricity in solid state. In solid form of H ₂ O , each oxygen atom is bonded to four hydrogen atoms, t