`underset("sulphide ore")(A)+NaCN  overset("air") Leftrightarrow   underset("complex")
Channel: Doubtnut
Date: 2021-11-10

`underset("sulphide ore")(A)+NaCN  overset("air") Leftrightarrow   underset("complex")(B)+Na_(2)S overset(O_(2))toNa_(2)SO_(4)` then B is: