Calculate the oxidation number of each sulphur atom in the following compounds:

(a) Na2S2O3 (b) Na2S4O6


(ii) Will the reactivity of both the isotopes of hydrogen be the same towards oxygen? Justify your answer.


(Oxidation no. of every atom is underlined by red.)


(a) Na2S2O3


NA2S2O3.JPG


(b) Na2S4O6


Na2S4o6.JPG


(ii) The reactivity of isotopes of hydrogen is not same towards oxygen because of their different bond dissociation enthalpy. Deuterium and tritium have higher bond dissociation enthalpy than hydrogen thus their reactivity is also low.


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