1.

Which of the following shows wrong matching

Answer»

`H_(2)C_(2)O_(4) overset("conc." H_(2)SO_(4)) to CO+CO_(2)+H_(2)O-H_(2)SO_(4)` an DEHYDRATING agent
`Cu+2H_(2)SO_(4) to CuSO_(4)+2H_(2)O+SO_(2)+H_(2)SO_(4)` as oxidizingagent
`Na_(2)S+H_(2)SO_(4) to Na_(2)SO_(4)+H_(2)S-H_(2)SO_(4)` as an ACID
`2HBr+H_(2)SO_(4) to 2H_(2)O+SO_(2)+Br_(2)-H_(2)SO_(4)` as reducing agent

Solution :`SO_(2)+2H_(2)O to H_(2)SO_(4)+2H`. COLOURED matter is REDUCED.
Coloured compound `+H to ` colourless compound
The bleaching action of `SO_(2)` is TEMPORARY and reversible.


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