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B
S2O2−4+2Ag2O+2OH−→2Ag+SO2−3+H2O
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C
2S2O2−4+3Ag2O+2OH−→2Ag+2SO2−3+H2O
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D
none of these
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Solution
The correct option is AS2O2−4+Ag2O+2OH−→2Ag+2SO2−3+H2O In option B, S and Ag of LHS and RHS are not equal hence not a balanced equation. Similar in option C. Whereas in option A, all the elements on LHS are same on RHS of the equation.