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

The emf of cell is 1.3 volt. The positive electrode has potential of 0.5 volt. The potential of negative electrode is

The electrode potential of a silver electrode dipped in $0.1MAgN{O}_{3}0.1\; M\; \backslash \; AgNO\_3$ solution at 298 K is ($E^0{}_{red}E^0\{\_\{red\}\}$  of Ag = 0.80 volt)

Which of the following species gains electrons more easily ?

In Nernst equation the constant 0.0592 at 298 K represents the value of

The concept of electrode potential is explained on the basis of

The standard reduction potentials of metals A and B are x and y respectively. If x > y, the standard emf of the cell containing these electrodes would be

The metal which cannot displace hydrogen from dil. $H_{2}S{O}_{4}H\_2SO\_4$ solution is

In the Lead storage battery during discharging

The efficiency of the hydrogen-oxygen fuel cell is about