In neutral or faintly alkaline solution, 8 moles of permanganate anion quantitative oxidise thiosulphate anions to produce X moles of a sulphur containing product. The magnitude of X is....

The possible number of geometrical isomers for the complex [CoL₂Cl₂]^-
(L= H₂NCH₂CH₂O^-) is (are)...

The reagent(s) that can selectively precipitate S^2- from a mixture of S^2- and SO₄^2- in aqueous solution is (are) :

The crystalline form of borax has.