A) \[C{{l}^{-}},1.0\]
B) \[C{{l}^{-}},2.0\]
C) \[B{{a}^{2+}},1.0\]
D) \[B{{a}^{2+}},0.5\]
Correct Answer: C
Solution :
[c] \[A{{s}_{2}}{{S}_{3}}\] sol is negatively charged owing to preferential adsorption of \[{{S}^{2-}}\] ions. Cation would be, the effective ion in coagulation. Flocculating value = minimum milli mol of the effective ion per litre of sol = \[\frac{4\times 0.005\times {{10}^{3}}}{4+16}=1.0\]
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