[" During the electrolysis if follphuric acid,which of the following processes are possible at the anode."],[" (1) "2H_(2)O_((l))rarr O_(2)+4H^(+)+4e^(-)E^(0)=1.23V],[" (2) "2SO_(4)^(2-)rarr S_(2)O_(8)^(2-)(aq)+2e^(-)E^(0)=1.96V]

Potential for some half cell reactions are given below. On the basis of these mark the correct answer. (i) H^(+)(aq) + e^(-) rightarrow (1/2)H^(2)(g) E_(cell)^(@) = 0.00V (ii) 2H_(2)O(l) rightarrow O_(2)(g) + 4H^(+)(aq) + 4e^(-) , E_(cell) = 1.23V (iii) 2SO_(4)^(2-)(aq) rightarrow S_(2)O_(8)^(2-)(aq) + 2e^(-), E_(cell)^(@) = 1.96V

Potential for some half cell reactions are given below. On the basis of these mark the correct answer. (i) H^(+)(aq) + e^(-) rightarrow (1/2)H^(2)(g) E_(cell)^(@) = 0.00V (ii) 2H_(2)O(l) rightarrow O_(2)(g) + 4H^(+)(aq) + 4e^(-) , E_(cell) = 1.96V (iii) 2SO_(4)^(2-)(aq) rightarrow S_(2)O_(8)^(2-)(aq) + 2e^(-), E_(cell)^(@) = 1.96V

The reaction at the anode and the cathode during the electrolysis of a concentrated aqueous solution of NaCl in presence of inert electrodes are : "Anode: "2Cl^(-)(aq)rarr Cl_(2)(g)+2e , E_("Red")^(@)=+1.36V "Cathode : "2H_(2)O(l)+2e rarr H_(2)(g)+2OH^(-)(aq)' E_("Red")^(@)=-0.83V. Cell reaction : 2Cl^(-)(aq)+2H_(2)O(l)rarr H_(2)+Cl_(2)+2OH^(-)(aq) . Which of the following statement is correct -

Use the standard reduction potentials to determine what is observed at the cathode during the electrolysis of a 1.0 M solution of KBr that contains phenolphthalein. O_(2)(g) + 4H^(+)(aq) + 4e^(-) rightarrow 2H_(2)O(l) E^(@) = 1.23V Br_(2)(l) + 2e^(-) rightarrow 2Br^(-)(aq) E^(@) = 1.07V 2H_(2)O(l) + 2e^(-) rightarrow H_(2)(g) + 2OH^(-) E^(@0 = -0.80V K^(+) (aq) + e^(-) rightarrow K(s) E^(@) = -2.92V