p-Block elementsHard

Question

Sodium thiosulphate is prepared by :

Options

A.reducing Na2SO4 solution with H2S
B.boiling Na2SO3 solution with S in alkaline medium
C.neutralising H2S2O3 solution with NaOH
D.boiling Na2SO3 solution with S in acidic medium

Solution

Na2SO3 + S  sodium thiosulphate
                                              

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