Arrange of the following in :
Arrange the following ions in order of their increasing radii:
Li⁺, Mg²⁺, K⁺, Al³⁺

The weight of $$1 \times 10^{22}$$ molecules of CuSO₄.5H₂O is ____.

The oxidation state of the most electronegative element in the products of the reaction. BaO₂ with dil. H₂SO₄ are

A 1.0 g sample of Fe₂O₃ solid of 55.2% purity is dissolved in acid and reduced by heating the solution with zinc dust. The resultant solution is cooled and made upto 100.0 ml. An aliquot of 25.0 ml of this solution requires 17.0 ml of 0.0167M solution of an oxidant for titration. Calculate the number of electrons taken by the oxidant in the reaction of the above titration.