Consider the reaction : H 2 SO 3 aq + Sn aq 4 + + H 2 O l ⁡ → Sn aq 2 + + HSO 4 aq - + 3 H aq + Which of the following statements is correct ?

H 2 SO 3 is the reducing agent because it undergoes oxidation

Sn 4 + is the oxidizing agent because it undergoes oxidation

Sn 4 + is the reducing agent because it undergoes oxidation

H 2 SO 3 is the reducing agent because it undergoes reduction

MEDIUM

Earn 100

Justify the following reaction as redox reaction. Identify the species oxidized or reduced and the oxidant and reductant.

$Zn + 2 HCl \to {ZnCl}_{2} + H_{2}$

Important Questions on Redox Reactions

MEDIUM

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

What will happen when a block of copper metal is dropped into a beaker containing a solution of

1 M

Z n S O_{4}

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

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)

EASY

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

Which of the following reactions is an example of a redox reaction?

MEDIUM

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

Dihydrogen reacts with

CuO

to give

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

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 ?

MEDIUM

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

Strongest reducing agent among the following is

(i) ${Na}^{+} + e^{-} \to {Na}_{(S)} - 2.7 E^{Θ} / v$

(ii) ${Al}^{3 +} + 3 e^{-} \to {Al}_{(S)} - 1.66 E^{θ} / v$

(iii) $F_{2 (g)} + 2^{e -} \to 2 F^{-} + 2.87 E^{O} / v$

(iv) $2 H_{2} O + 2 e^{-} \to F_{2 (g)} + 2 {OH}^{-} {}_{(9 g)}- 0.83 E^{Θ} / v$

HARD

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

Which of the following processes does not involve oxidation of iron?

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?

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

In the electrolysis of a

{CuSO}_{4}

solution, how many grams of

Cu

are plated out on the cathode, in the time that is required to liberate

5.6 L

O_{2} (g)

, measured at

1 atm

and

273 K

, at the anode?

MEDIUM

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

Which of the following statement is incorrect regarding the equation

MeCHO + {[Ag {({NH}_{3})}_{2}]}^{+} + \bar{O} H ⟶ {MeCOO}^{-} + Ag

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

A filter paper soaked in salt

X

turns brown when exposed to

{HNO}_{3}

vapor. The salt

X

EASY

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

In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used are respectively:

EASY

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

Which of the following equation depicts the oxidizing nature of

H_{2} O_{2}

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?

MEDIUM

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

The equivalent weight of

{KMnO}_{4}

in acidic and strongly alkaline medium, respectively, are,

EASY

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

Which of the following is NOT an oxidation reduction?

Justify the following reaction as redox reaction. Identify the species oxidized or reduced and the oxidant and reductant. Zn+ 2HCl → ZnCl2 + H2

Important Questions on Redox Reactions

Learn and Prepare for any exam you want !

Justify the following reaction as redox reaction. Identify the species oxidized or reduced and the oxidant and reductant.

$Zn + 2 HCl \to {ZnCl}_{2} + H_{2}$