A substance on treatment with dil. H2SO4. liberates a colourless gas which produces (i) turbidity with baryta water and (ii) turns acidified dichromate solution green. The reaction indicates the presence of:
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a
CO32−
b
S2−
c
SO32−
d
NO2⊖
answer is C.
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Detailed Solution
BaSO3+2HCl( dil. )⟶2NaCl+H2O+SO2K2Cr2O7+H2SO4+3SO2⟶K2SO4+H2O+Cr2SO43 Green