Q.

Correct formula of Hypo is

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a

Na2S2O3

b

Na2S2O3.H2O

c

Na2S2O3.4H2O

d

Na2S2O3.5H2O

answer is D.

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Detailed Solution

Hypo = Sodium thiosulphate contain 5 water molecules in each monoclinic structure.

Hypo is available usually as pentahydrate, because of unsymmetrical (monoclinic) structure cause more interstitial space, therefore 5 water molecules easily occupies these spaces.

 

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