1.

In the reaction : 3Br_(2)+6CO_(3)^(2-)+3H_(2)Oto5Br^(-)+BrO_(3)^(-)+6HCO_(3)^(-)

Answer»

Bromine is oxidised and CARBONATE is reduced
Bromine is neither oxidised nor reduced
Bromine is oxidised and WATER is reduced
Bromine is both reduced and oxidised.

Solution :For the REACTION :
`Zn(s)+2H^(+)(aq)toZn^(2+)(aq)+H_(2)(g)`
`E=E^(@)-(RT)/(nF)"in "([Zn^(2+)](pH))/([H^(+)]^(2))`
On adding `H_(2)SO_(4)`, the `[H^(+)]`increases . This will increases the value of E and , therefore reaction PROCEEDS more to the right.


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