s-Block ElementsHard

Question

Acidified solutions of sodium thiosulphate are unstable because :

Options

A.they have the tendency to oxidise.
B.they have the tendency to disproportionate.
C.they have the tendency to reduce.
D.they have weaker S - S bonds.

Solution

Sulphur is in + 6 and - 2 ; two oxidation states and in acidic medium they undergo disproportionation reactions,    Na2S2O3 + 2 HCl → 2 NaCl + SO2+4 + S0 + 3 H2O

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