Chemistry Electrochemistry

Consider the reaction N2O4(g) ⇌ 2NO2(g). The temperature at which Kc = 20.4 and Kp = 600.1, is ______ K. (Round off to the nearest integer).
[Assume all gases are ideal and R = 0.0831 L bar mol⁻¹ K⁻¹]

An oxidation - reduction in which 3 electrons are transferred has a ∆Gº of 17.37 kJ mol⁻¹ at 25°C. The value of E°cell (in V is _ * 10⁻²)(1 F = 96,500Cmol⁻¹)

For the given cell;
Cu(s)|Cu²⁺(C₁M) Cu²⁺(C₂M)|Cu(s)
Change in Gibbs energy (ΔG) is negative, if

250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1M AgNO3 and 0.1M AuCl. The solution was electrolyzed at 2 V by passing a current of 1 A for 15 minutes. The metal/metals electrodeposited will be : (E°Ag+/Ag = 0.8 V, E°Au+/Au = 1.69 V)

Identify the incorrect statement from the options below for the above cell:

An acidic solution of dichromate is electrolyzed for 8 minutes using $2\mathrm{A}$  current. As per the following equation ${\mathrm{C}\mathrm{r}}_2{\mathrm{O}}_7^{2-}+14{\mathrm{H}}^{+}+6{\mathrm{e}}^{-}\to 2{\mathrm{C}\mathrm{r}}^{3+}+7{\mathrm{H}}_2\mathrm{O}$   . The amount of ${\mathrm{C}\mathrm{r}}^{3+}$ obtained was $0.104\mathrm{g}$   . The efficiency of the process (in %) is (Take: $\mathrm{F}=96000\mathrm{C}$   , At. Mass of chromium $=52$    )