In the electrochemical cell: 
  $Zn | ZnS{O}_4 (0.01 M) || CuS{O}_4(1.0 M) | C\mathrm{u, }$the emf of this Daniel cell is E₁. When the concentration of ZnSO₄ is changed to 1.0 M and that of CuSO₄ is changed to 0.01 M, the emf changes to E₂. From the following, which one is the relationship between E₁ and E₂ ? 
(Given, \(\frac{RT}{F}\) = 0.059)

1. $E_1<E_2$

2. $E_1>E_2$

3. $E_2=0\ne E_1$

4. $E_1=E_2$

If the E^o_cell for a given reaction has a negative value, which of the following gives correct relationships for the values of  ∆G^o and K_eq?

1. $∆{\mathrm{G}}^{\mathrm{o}} > 0; {\mathrm{K}}_{\mathrm{eq}}< 1$

2. $∆{\mathrm{G}}^{\mathrm{o}} > 0; {\mathrm{K}}_{\mathrm{eq}}> 1$

3. $∆{\mathrm{G}}^{\mathrm{o}} < 0; {\mathrm{K}}_{\mathrm{eq}}> 1$

4. $∆{\mathrm{G}}^{\mathrm{o}} < 0; {\mathrm{K}}_{\mathrm{eq}}< 1$

The number of electrons delivered at the cathode during electrolysis by a current of 1 ampere in 60 seconds is : 

(Charge on electron = 1.60x 10^-19 C)

1.  $6\times {10}^{23}$

2.  $6\times {10}^{20}$

3.  $3.75\times {10}^{20}$

4.  $7.48\times {10}^{20}$

Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below: 
 
Then the species undergoing disproportionation is:-

1. 

2. 

3. 

4. HBrO

The pressure of H₂ required to make the potential of H₂ - electrode zero in pure water at 298 K is

1. 10^-12  atm
2. 10^-10  atm
3. 10^-4  atm
4. 10^-14 atm

A device that converts energy of combustion of fuels, like hydrogen and methane, directly into electrical energy is known as : 

When 0.1 mol MnO₄^2- is oxidized the quantity of electricity required to completely oxidise MnO₄^2--  to MnO₄^- is : 

1. 96500 C

2. 2 x 96500 C

3. 9650 C

4. 96.50 C

The weight of silver (at.wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of O₂ at STP will be :

1. 5.4 g

2. 10.8 g

3. 54.0 g

4. 108.0 g

A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be : 

1. 0.59 V
2. 0.118 V
3. 1.18 V
4. 0.059 V