20. When S02 gas is passed through saturated solution of H2S, which of the following reaction occurs (a) SO. + 2H-S-2H20 + 3S (b) SO. + 2H.S → H20 + 3S (c)SO. +H SHO+S (d) SO. +H.O - SO, +H,
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option (b)SO+2HS---H2O+3S
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