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.

Options

A. `i,ii,iii`
B. `i,ii`
C. `ii,iii`
D. `i,ii`

Answer

B

Explanation

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 consposition e.g. `ZrH_(x)(1.30 lt= x lt=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 two by hydrogen atoms and two by normal covalent bonds in a near tetrahedral configuration.