A) \[{{H}^{+}}\]
B) \[O{{H}^{-}}\]
C) \[{{O}^{2-}}\]
D) \[{{S}^{2-}}\]
Correct Answer: D
Solution :
Charge on \[A{{s}_{2}}{{S}_{3}}\] sol is due to the adsorbed sulphide ion.
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