Co(II) is stable in aqueous solution, but in presence of complexing reagent it is easily oxidised. Explain.

How would you account for the following: Cobalt(II) is stable in aqueous solution but in the presence of complexing reagents it is easily oxidised.

In aqueous solutions Cu^+ is less stable than Cu^(2+)

Aqueous copper sulphate solution (blue in colour) gives: a bright green solution with aqueous potassium chloride. Explain these experimental results.

The treatment of alkyl chlorides with aqueous KOH leads to the formation of alcohols but in the presence of alcoholic KOH, alkenes are major product. Explain.

rhe treatment of alkyl chlorides with aqueous KOH leads to the formation of alcohols hut in presence of alocholic KOH, alkenes are major products. Explain.

An aqueous solution of metal ion M_1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M_2 always forms tetrahedral complexes with these reagents. Aqueous solution of M_2 on reaction with reagent S gives white precipitate which dissolves in excess of S. The reactions are summarized in the scheme given below : M1, Q and R , respectively are :

Explain the following observations : Although Co^(2+) ion appears to be stable, it is easily oxidised to Co^(3+) ion in the presence of a strong ligand.

Aqueous copper sulphate solution (blue in colour) gives : (i) a green Precipitate with aqueous potassium fluoride and (ii) a bright green solution with aqueous potassium chloride. Explain these expeimental results.