Electrochemistr...

The standard reduction potential for $$Zn^{2+}/ Zn, Ni^{2+}/ Ni$$ and $$Fe^{2+}/ Fe$$ are $$-0.76, 0.23$$ and $$-0.44\ V$$, respectively.

Which one is/ are correct among the following?
Given, the half cell emf's $$E^{0}_{Cu^{+2}/ Cu} = 0.337, E^{0}_{Cu^{+1}/ Cu} = 0.521$$.

$$1000\ mL\ of\ 1\ M\ CuSO_{4}(aq)$$ is electrolysed by $$9.65$$ ampere current for $$100$$ sec using $$Pt-electrode$$. Which of the following is incorrect statement?

In hydrogen-oxygen fuel cell the carbon rods are immersed in hot aqueous solution of.

Consider the following equations for a cell reaction
$$A + B \rightleftharpoons  C+D$$  $$ E^0=x\,volt,k_{eq}=k_1$$
$$2A+2B \rightleftharpoons  2C+2D $$ $$E^0=y\, volt,k_{eq}=K_2$$ then: 

Among the following cells, which of the following are primary cells?

$$H_{2}(g)$$ and $$O_{2}(g)$$, can be produced by the electrolysis of water. What total volume (in $$L$$) of $$O$$ and $$H_{2}$$ are produced at $$STP$$ when a current of $$30\ A$$ is passed through a $$K_{2}SO_{4}(aq)$$ solution for $$193\ min.$$?

6.5 g $$Mg$$ deposits on electrolysis of $$MgCl_2$$ (fused) then what will be the volume of chlorine gas at STP discharged at electrode?

An electrolytic cell is composed of $$Cu$$ and $$Zn$$. A current of $$9.65\ A$$ is drawn from a cell for $$1$$ hour. Then the loss in mass at anode and gain in mass at cathode, respectively could be:

For the cell prepared from electrode $$A$$ and $$B$$, electrode $$A:$$ $$\displaystyle\frac{Cr_2O^{2-}_7}{Cr^{3+}}$$, $$E^0_{red}=+1.33$$V and electrode $$B:$$ $$\displaystyle\frac{Fe^{3+}}{Fe^{2+}}$$, $$E^0_{red}=0.77$$V, which of the following statement is not correct?