1.

During thhe preparation of H_(2)S_(2)O_(8) (per disulphuric acid) O_(2) gas also releases at anode as byproduct. When 9.72 of H_(2) releases at cathode and 2.35L O_(2) at anode at STP, the weight of H_(2)S_(2)O_(8) produced in gram is

Answer»

87.12
43.56
83.42
51.74

Solution :`(9.72)/(22.4)xx2=(2.35)/(22.4)xx4+(W)/(194)xx2` or `W=43.47g`


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