Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

MEDIUM

Earn 100

Explain the observations made when zinc rod is kept in copper nitrate solution.

Important Questions on Redox Reactions

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

The electrode potential of

M^{2 +} / M

of

3

d-series elements shows positive value for?

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

What is the standard potential of cell

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

If

{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 in Terms of Electron Transfer

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

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

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

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

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

Given

E_{{Cl}_{2} / {Cl}^{-}}^{o} = 1 .36 V, E_{{Cr}^{3 +} / Cr}^{o} = - 0 .74 V

E_{{Cr}_{2} O_{7}^{2 -} / {Cr}^{3 +}}^{o} = 1 .33 V, E_{{MnO}_{4}^{-} / {Mn}^{2 +}}^{o} = 1 .51 V .

Among the following, the strongest reducing agent is:

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

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

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

Among the following, which is the strongest oxidizing agent?

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

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

Question Image

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

(a) H_{2} O_{2} + O_{3} \to H_{2} O + 2 O_{2}

{(b) H}_{2} O_{2} + A g_{2} O \to 2 A g + H_{2} O + O_{2}

Role of hydrogen peroxide in the above reactions is respectively:

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

The order of reactivity of

K, M g, A u

and

Z n

with water is

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

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

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

Which among the following compounds does not act as a reducing agent?

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

Consider the reaction :

H_{2} {SO}_{3 (aq)} + {Sn}_{(aq)}^{4 +} + H_{2} O_{(l)} \to {Sn}_{(aq)}^{2 +} + {HSO}_{4 (aq)}^{-} + 3 H_{(aq)}^{+}

Which of the following statements is correct ?

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

In which of the following reactions

H_{2} O_{2}

acts as a reducing agent ?

(a) H_{2} O_{2} + 2 H^{+} + 2 e^{-} \to 2 H_{2} O

(b) H_{2} O_{2} - 2 e^{-} \to O_{2} + 2 H^{+}

(c) H_{2} O_{2} + 2 e^{-} \to 2 {OH}^{-}

(d) H_{2} O_{2} + 2 {OH}^{-} - 2 e^{-} \to O_{2} + 2 H_{2} O

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

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

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

How many electrons are involved in the following redox reaction ?

{Cr}_{2} O_{7}^{2 -} + {Fe}^{2 +} + C_{2} O_{4}^{2 -} \to {Cr}^{3 +} + {Fe}^{3 +} + {CO}_{2}

(Unbalanced)

HARD

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

Choose the correct statement(s) among the following.

HARD

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

The redox reaction among the following is:

MEDIUM

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

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

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

The pair of compounds that can exist together is:

EASY

Chemistry>Physical Chemistry>Redox Reactions>Redox Reactions in Terms of Electron Transfer

Hot concentrated sulphuric acid is a moderately strong oxidizing agent. Which of the following reactions does not show oxidizing behaviour?