1.

Hot concentrated suphuric acid is a moderately strong oxidizing agent which of the followng reaction does not show oxidizing behaviour ?

Answer»

`Cu+2H_(2)SO_(4)rarrCuSO_(4)+SO_(2)+2H_(2)O`
`S+2H_(2)SO_(4)rarr3SO_(2)+2H_(2)O`
`C+2H_(2)SO_(4)rarrCO_(2)+2SO_(2)+2H_(2)O`
`CaF_(2)+_(2)SO_(4)rarrCaSO_(4)+2HF`

Solution :`CaF_(2)+H_(2)SO_(4) rarr CaSO_(4)+2HF`
Here the os of all the atoms do not change and hence it is not a REDOX reaction in other words `H_(2)SO_(4)` does notact as an oxidising AGENT in this rection while in all the reamianing reaction s it ACTS as an oxidising agent


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