Question

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`
A. In dilute sulphuric acid solution, hydrogen will be reduced at cathode.
B. In concentration sulphuric acid solution, water will be oxidised at anode.
C. In dilute sulphuric acid solution, water will be oxidised at anode.
D. In dilute sulphate acid solution, `SO_(4)^(2-)` ion will be oxidised to tetrathionate ion at anode.

Answer 1

Correct Answer - A::C
(a, b) are both correct options.