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

EASY

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In which of the following reaction(s) $H_{2} S O_{4}$ act as an oxidising agent and as well as acid?

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Important Questions on Chemistry

HARD

General Knowledge>General Science>Chemistry>Atomic Structure

The redox reaction among the following is:

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

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

General Knowledge>General Science>Chemistry>Atomic Structure

(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

General Knowledge>General Science>Chemistry>Atomic Structure

{SO}_{2} + 2 HS \to 3 S + 2 H_{2} O

This equation represents preparation of sulphur sol by

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

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

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

A filter paper soaked in salt

X

turns brown when exposed to

{HNO}_{3}

vapor. The salt

X

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

The pair of compounds that can exist together is:

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

Which of the following is not true for oxidation?

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

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

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

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

General Knowledge>General Science>Chemistry>Atomic Structure

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

General Knowledge>General Science>Chemistry>Atomic Structure

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

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

Which of the following equation depicts the oxidizing nature of

H_{2} O_{2}

MEDIUM

General Knowledge>General Science>Chemistry>Atomic Structure

Which of the following statement is incorrect regarding the equation

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

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

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

MEDIUM

General Knowledge>General Science>Chemistry>Atomic Structure

The equivalent weight of

{KMnO}_{4}

in acidic and strongly alkaline medium, respectively, are,

MEDIUM

General Knowledge>General Science>Chemistry>Atomic Structure

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

General Knowledge>General Science>Chemistry>Atomic Structure

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

General Knowledge>General Science>Chemistry>Atomic Structure

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

EASY

General Knowledge>General Science>Chemistry>Atomic Structure

Which of the following is NOT an oxidation reduction?

In which of the following reaction(s) H2SO4 act as an oxidising agent and as well as acid?

Important Questions on Chemistry

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In which of the following reaction(s) $H_{2} S O_{4}$ act as an oxidising agent and as well as acid?