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The amount of $A g$ (atomic mass = 108) deposited at the cathode when a current of 0.5 amp is passed through a solution of $A g N O_{3}$ for 1 hour is closest to

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Important Questions on Redox Reactions

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

Among the following, which is the strongest oxidizing agent?

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

In the following resonance structures, the curved arrow indicates that electrons are shifted from

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

Hypophosphorus acid is a good reducing agent because

HARD

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

An aqueous solution of nickel (II) sulphate was electrolyzed using nickel electrodes. Observe the diagram and answer the question that follows:

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What do you observe at the cathode and anode respectively?

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

Which of the following metals will precipitate copper from copper sulphate solution?

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

An aqueous solution of nickel (II) sulphate was electrolyzed using nickel electrodes. Observe the diagram and answer the question that follows:

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Which equation for the reaction at the anode is correct?

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

The electrode potential of

M^{2 +} / M

3

d-series elements shows positive value for?

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

The reaction,

K_{2} {Cr}_{2} O_{7} + m {FeSO}_{4} + n H_{2} {SO}_{4} \to {Cr}_{2} {({SO}_{4})}_{3} + p {Fe}_{2} {({SO}_{4})}_{3} + K_{2} {SO}_{4} + q H_{2} O

when balanced,

m, n, p, and q

are, respectively:

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

The electrode potential, $E °,$ for the reduction of ${MnO}_{4}^{-}$ to ${Mn}^{2 +}$ in acidic medium is $+ 1.51$
V. Which of the following metal(s) will be oxidised? The reduction reactions and standard electrode potentials for ${Zn}^{2 +}, {Ag}^{+}$ and ${Au}^{+}$ ${Au}^{+}$ are given as

${Zn}^{2 +} (aq) + 2 e ⟶ Zn (s), E ° = - 0.762 V$

${Ag}^{+} (aq) + e ⇌ Ag (s), E ° = + 0.80 V$

${Au}^{+} (aq) + e ⇌ Au (s), E ° + 1.69 V$

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

An iron wire is immersed in a solution containing

{ZnSO}_{4}

and

{NiSO}_{4}

. When the concentration of each salt is

1 M

, predict which of the following reaction is likely to proceed.
Given

E^{o} ({Zn}^{+ 2} / Zn) = - 0.76 V

E^{o} ({Fe}^{+ 2} / Fe) = - 0.44 V

and

E^{o} ({Ni}^{+ 2} / Ni) = - 0.25 V

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified

K M n O_{4}

for complete oxidation?

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

Which of the following transformations can be carried out by using

H I

as a reducing agent, under acidic conditions?

[Given :

I_{2} (s) \to 2 I^{-} E^{o} = 0.54 V

]

(i)

C u^{+} \to C u (s) E^{o} = 0.52 V

(ii)

C r^{3 +} \to C r^{2 +} E^{o} = - 0.41 V

(iii)

F e^{3 +} \to F e^{2 +} E^{o} = 0.77 V

(iv)

F e^{2 +} \to F e (s) E^{o} = - 0.44 V

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

Consider the following reaction:

x {MnO}_{4}^{-} + y C_{2} O_{4}^{2 -} + {zH}^{+} ⟶ x {Mn}^{2 +} + 2 y {CO}_{2} + \frac{z}{2} H_{2} O

The values of x, y and z in the reaction are, respectively:

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

An aqueous solution of nickel (II) sulphate was electrolyzed using nickel electrodes. Observe the diagram and answer the question that follows:

Question Image

Name the cation that remains as a spectator ion in the solution.

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

The number of moles of

{KMnO}_{4}

required to oxidise one equivalent of

KI

in the presence of sulphuric acid is-

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

What are the coefficients $x, y, z, p, q, r$ and $s$ , respectively, in the following balanced equation?

${xHNO}_{2 (aq)} + {yKMnO}_{4 (aq)} + {zH}_{2} {SO}_{4 (aq)} \to {pHNO}_{3 (aq)} + q K_{2} {SO}_{4 (aq)} + {rMnSO}_{4 (aq)} + {sH}_{2} O_{(II)}$

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

For the reaction:

I^{-} + C l O_{3}^{-} + H_{2} S O_{4} \to C l^{-} + H S O_{4}^{-} + I_{2}

The correct statement(s) in the balanced equation is/are:

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

The hydrogen electrode is dipped in a solution of

pH = 3 at 25 ° C

, the potential of the cell would be (the value of

\frac{2.303 RT}{F} = 0.059 V

)

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Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

What is the standard potential of cell

Ni ∣ {Ni}^{2 +} (1 M) ‖ {Cu}^{2 +} (1 M) | Cu

{E^{o}}_{{Cu}^{+ 2} | Cu} = 0 \cdot 337 V

and

{E^{o}}_{{Ni}^{+ 2} | Ni} = - 0 \cdot 236 V

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions and Electrode Processes

The order of reactivity of

K, M g, A u

and

Z n

with water is

The amount of Ag (atomic mass = 108) deposited at the cathode when a current of 0.5 amp is passed through a solution of AgNO3 for 1 hour is closest to

Important Questions on Redox Reactions

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The amount of $A g$ (atomic mass = 108) deposited at the cathode when a current of 0.5 amp is passed through a solution of $A g N O_{3}$ for 1 hour is closest to