A solution contains Fe 2 + , Fe 3 + and I - ions. This solution was treated with iodine at 35 ° C . E ° for Fe 3 + | Fe 2 + is + 0 . 77 V and E ° for I 2 | I - = 0 . 536 V The favourable redox reaction is:

There will be no redox reaction

Fe 2 + will be oxidised to Fe 3 +

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Consider the following relations for emf of a electrochemical cell :
(a) $emf$ of cell $=$ (Oxidation potential of anode) (Reduction potential of cathode)
(b) $emf$ of cell $=$ (Oxidation potential of anode) $+$ (Reduction potential of cathode)
(c) $emf$ of cell $=$ (Reduction potential of anode) $+$ (Reduction potential of cathode)
(d) $emf$ of cell $=$ (Oxidation potential of anode) (Oxidation potential of cathode) Which of the above relations are correct :

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Important Questions on Electrochemistry

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 3

Which of the following expressions correctly represents the equivalent conductance at infinite dilution of

{Al}_{2} {({SO}_{4})}_{3},

Given that

Λ_{{Al}^{3 +}} °

and

Λ_{{SO}_{4}^{2 -}} °

are the equivalent conductance at infinite dilution of the respective ions?

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 4

For the reduction of silver ions with copper metal, the standard cell potential was found to be

+ 0.46 V

25 ° C

. The value of standard Gibbs energy,

{ΔG}^{0}

will be

(F = 96500 C {mol}^{- 1})

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 5

The limiting molar conductance of

H^{+}

and

{CH}_{3} {COO}^{-}

ions are 344 ohm

344 ohm {}^{- 1} {cm}^{2} {mol}^{- 1}

and

40 {ohm}^{- 1} {cm}^{2} {mol}^{- 1}

respectively. Molar conductance of

0.008 M

{CH}_{3} COOH

48 .

What will be the value of

K_{a}

for

{CH}_{3} COOH :

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 7

Standard electrode potential of three metals

X

Y

and

Z

are

- 1.2 V, + 0.5 V

and

- 3.0 V

respectively. The reducing power of these metals will be :

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 8

The electrode potentials for ${Cu}_{(aq)}^{2 +} + e^{-} ⟶ {Cu}_{(aq)}^{+}$ and ${Cu}_{(aq)}^{+} + e^{-} ⟶ {Cu}_{(s)}$ are $+ 0.15 V$ and $+ 0.50$ , respectively. The value of $E_{{Cu}^{2 +} / Cu} °$ will be :

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 9

Standard electrode potential for

{Sn}^{4 +} / {Sn}^{2 +}

couple is

+ 0.15 V

and that for the

{Cr}^{3 +} / Cr

couple is

- 0.74 V .

These two couples in their standard state are connected to make a cell. The cell potential will be:

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 10

If the

E_{cell} °

for a given reaction has a negative value, then which of the following gives the correct relationships for the values of

ΔG °

and

K_{eq} ?

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Beta Question Bank for Medical: Chemistry>Chapter 9 - Electrochemistry>EXERCISE-II (Previous Year Questions)>Q 11

A solution contains

{Fe}^{2 +}, {Fe}^{3 +}

and

I^{-}

ions. This solution was treated with iodine at

35 ° C

E °

for

{Fe}^{3 +} | {Fe}^{2 +}

+ 0.77 V

and

E °

for

I_{2} | I^{-} = 0.536 V

The favourable redox reaction is:

Important Questions on Electrochemistry

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