106iii. SO2 + H2S --> S (yellow turbidity of colloidal sulphur) + H2O
iv. H2S + H2O2 --> S + H2O (yellow turbidity as abv)
ii. Na2S2O3 + Cl2 --> Na2SO4 + NaCl (no turbidity)
i. (not sure .. maybe colloidal sulphur is formed)
SO (c)
i Na2S2O3 + dil HCl →
ii Na2S2O3(aq) + Cl2 →
iii SO2 + H2S →
iv H2S + H2O2 →
the reacns givin yellow turbidity are:
a)ii,iii,iv b)iii and iv c)i,iii,iv d)i,ii,iii,iv
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2 Answers
106
1Na2S2O3 + dil 2HCl →2NaCl+H2O+SO2+S
colloidal S is formed in ist reaction giving yellow colour.
But ashish,i have doubt about ii reaction
why should it not give turbidity?
Cl2can react with the water in the aq soln to give HCl which can then react in a similar way as in i ???
ans given is c,i,iii,iv.
but why not ii as per my explanation?somebedy plz explain this!