Consider the following half cell reactions.
Mn²⁺ + 2e^- ➝ Mn E^o = -1.18V
Mn²⁺ ➝ Mn³⁺ + e^- E^o = -1.51V
The E^o for the reaction 3Mn²⁺➝ Mn + 2Mn³⁺, and the possibility of the forward reaction are respectively.

(a)

2.69V and spontaneous

(b)

-2.69 and non spontaneous

(c)

0.33V and Spontaneous

(d)

4.18V and non spontaneous

Faraday constant is defined as_______.

(a)

charge carried by 1 electron

(b)

charge carried by one mole of electrons

(c)

charge required to deposit one mole of substance

(d)

charge carried by 6.22 ×10¹⁰ electrons

The number of electrons delivered at the cathode during electrolysis by a current of 1A in 60 seconds is ____. (charge of electron = 1.6 ×10⁻¹⁹C )

(a)

6.22 ×10²³

(b)

6.022 ×10²⁰

(c)

3.75 ×10²⁰

(d)

7.48 ×10²³

While charging lead storage battery _______.

(a)

PbSO₄ on cathode is reduced to Pb

(b)

PbSO₄ on anode is oxidised to PbO₂

(c)

PbSO₄ on anode is reduced to Pb

(d)

PbSO₄ on cathode is oxidised to Pb

In H₂-O₂ fuel cell the reaction occur at cathode is _______.

(a)

O_2(g) + 2H₂O_(l) + 4e^- ⟶ 4OH⁻ _(aq)

(b)

H⁺(aq) + OH⁻ (aq) ⟶ H₂O (l)

(c)

2H₂ (g) + O₂ (g) ⟶ 2H₂O (g)

(d)

H⁺ + e^- ⟶ 1/2 H₂

In the electrochemical cell: Zn|ZnSO_{4 (0.01M)}|| CuSO_{4 (1.0M)}|Cu, the emf of this Daniel cell is E₁. When the concentration of ZnSO₄ is changed to 1.0M and that CuSO₄ changed to 0.01M, the emf changes to E₂. From the above, which one is the relationship between E₁ and E₂?

(a)

E₁ < E₂

(b)

E₁ > E₂

(c)

E₂ ≥ E₁

(d)

E₁ = E₂

A gas X at 1 atm is bubbled through a solution containing a mixture of 1MY^- and 1MZ^- at 25^oC. If the reduction potential of Z>Y>X, then_____.

(a)

Y will oxidize X and not Z

(b)

Y will oxidize Z and not X

(c)

Y will oxidize both X and Z

(d)

Y will reduce both X and Z

Pick out the correct statement regarding resistance of an electrolytic solution ________.

(a)

It is inversely proportional to the length (I)

(b)

It is inversely proportional to the cross sectional area (A)

(c)

It is directly proportional to the cross sectional area (A)

(d)

Resistivity is denoted by p (rho)

Which of the statements about electrolytic conductance is not true?

(a)

Conductivity increases with decrease in viscosity.

(b)

Higher dielectric constant shows lower conductance in solution.

(c)

Temperature increases, conductance also increases.

(d)

Molar conductance increases with increase in dilution.

Kohlraush's law is applied to calculate ________.

(a)

molar conductance at infinite dilution of a weak electrolyte

(b)

degree of dissociation of weak electrolyte

(c)

solubility of a sparingly soluble salt

(d)

all the above

The laws of electrolysis were enunciated first by

(a)

Dalton

(b)

Faraday

(c)

Kekule

(d)

Avogadro

For the given cell Cr_(s)|Cr³⁺_(aq)||Cu²⁺_(aq)|Cu_(s) which is correct?

(a)

Cr is the anode

(b)

Cu is the anode

(c)

Overall cell reaction is 2Cr³⁺_(aq) +3Cu_(s) ⟶ 2Cr_(s) + 3Cu²⁺_(aq) 

(d)

Cu is the anode and Overall cell reaction is 2Cr³⁺_(aq) +3Cu_(s) ⟶ 2Cr_(s) + 3Cu²⁺_(aq) 

The standard conditions for determination of standard emf of the cell are ______.

(a)

1M solution of the reactant

(b)

temperature of 25°C

(c)

both 1M solution of the reactant and temperature of 25°C

(d)

none of these

The quantity of charge required to obtain 1 mole of aluminum from Al₂O₃ is ______.

(a)

2F

(b)

3F

(c)

6F

(d)

12F

Leclanche cell is ______.

(a)

primary battery

(b)

secondary battery

(c)

rechargeable

(d)

both secondary battery and rechargeable

When a zinc metal strip is placed in a copper sulphate solution the blue colour of the solution fades and copper is deposited on the zinc strip as red - brown crust. The oxidation half cell reaction of the above process is represented as _______.

(a)

Cu²⁺_(aq) + 2e^- ⟶ Cu_(s)

(b)

Cu_(s) ⟶ Cu²⁺+ 2e^-

(c)

Zn_(S) ⟶ Zn²⁺_(aq) + 2e^-

(d)

Zn²⁺_(aq) + 2e^- ⟶ Zn_(s)

Debye constants A and B depend on ______.

(a)

nature of the solvent

(b)

temperature

(c)

concentration of the solvent

(d)

both nature of the solvent and temperature

_______ is the reciprocal of resistance.

(a)

specific conductance

(b)

molar conductance

(c)

specific resistance

(d)

conductance

The electrode where there is gain of electrons is called ______.

(a)

cathode

(b)

anode

(c)

electrode

(d)

both anode and electrode

SHE is _______.

(a)

Standard Helium Electorde

(b)

Standard Hydrogen Electrode

(c)

Standard Mercury Electrode

(d)

none of these