1.

Which oxyacid of sulphur has S-O-S link ? How is it prepared?

Answer»

Solution :`H_(2)S_(2)O_(7)` oleum (or) fuming (or) pyrosulphuric acid has `S-O-S` link.
Pyrosulphuric acid is prepared by dissolving sulphur TRIOXIDE in CONCENTRATED SULPHURIC acid.
`SO_(3)+H_(2)SO_(4)rarrH_(2)S_(2)O_(7)`


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