Hydrogen peroxide in its reaction with KIO 4 and NH 2 OH respectively, is acting as a

reducing agent, oxidising agent

oxidising agent, oxidising agent

oxidising agent, reducing agent

The following reactions show the H 2 O 2 behaviour in I and II reactions as: I. PbS s + 4 H 2 O 2 aq ⟶ PbSO 4 s + 4 H 2 O l II . HOCl + H 2 O 2 ⟶ H 3 O + + Cl - + O 2

Oxidising in acidic medium and reducing in acidic medium

Oxidising in acidic medium and reducing in basic medium

Reducing in acidic medium and oxidising in basic medium

Reducing in acidic medium and oxidising in acidic medium

MEDIUM

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An orange coloured solution of $K_{2} {Cr}_{2} O_{7}$ acidified with $H_{2} {SO}_{4}$ and treated with a substance $X$ gives a blue coloured solution of ${CrO}_{5}$ . The substance $X$ is

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Important Questions on Elements of Group 1 and Group 2

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Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

When

H_{2} O_{2}

is added to an acidified

K_{2} C r_{2} O_{7}

solution

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The volume strength of

1 M H_{2} O_{2}

is:

(Molar mass of

H_{2} O_{2} = 34 g mol^{- 1}

)

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The strengths of

5.6

volume hydrogen peroxide (of density

1 g / mL

) in terms of mass percentage and molarity

(M)

respectively, are: (Take molar mass of hydrogen peroxide as

34 g / mol

)

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

Hydrogen peroxide, in the pure state, is :

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Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

Hydrogen peroxide in its reaction with KIO₄ and NH₂OH respectively, is acting as a

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The volume strength of

8.9 M H_{2} O_{2}

solution calculated at

273 K

and 1 atm is

........ (R = 0 .0821 L atm K^{- 1} {mol}^{- 1})

(rounded off to the nearest integer)

HARD

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

Among statements

(a) - (d)

, the correct ones are:

(a)

Decomposition of hydrogen peroxide gives di-oxygen.

(b)

Like hydrogen peroxide, compounds, such as

K C l O_{3}, P b (N O_{3})

and

{N a N O}_{3}

When heated liberate di-oxygen.

(c)

2

-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide.

(d)

Hydrogen peroxide is used for the manufacture of sodium perborate.

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

When

2.0 mL

15.18 % (w / v) H_{2} O_{2}

solution is decomposed the volume of oxygen liberated at

STP

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The strength of $11.2$ volume solution of $H_{2} O_{2}$ is

[Given that, the molar mass of $H = 1 g m o l^{- 1}$ and $O = 16 g m o l^{- 1}$ ]

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The reaction of aqueous

K M n O_{4}

with

H_{2} O_{2}

in acidic conditions gives:

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

Consider the following equations :
$2 {Fe}^{2 +} + H_{2} O_{2} \to xA + yB$

(in basic medium)

$2 {MnO}_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} \to x^{'} C + y^{'} D + z^{'} E$

(in acidic medium)

The sum of the stoichiometric coefficients $x, y, x^{'}, y^{'}$ and $z^{'}$ for products $A, B, C, D$ and $E$ respectively, is _______

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

In which of the following reactions, hydrogen peroxide acts as an oxidizing agent?

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

Hydrogen peroxide is stored away from light because it can get decomposed when exposed to light as

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The chemical nature of hydrogen peroxide is:

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Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

5.0 mL

\underline{X}

volume hydrogen peroxide solution on decomposition produces

100 mL

of oxygen at STP. The value of

\underline{X}

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Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The following reactions show the $H_{2} O_{2}$ behaviour in $I$ and $II$ reactions as:
$\begin{array}{l} I. PbS (s) + 4 H_{2} O_{2} (aq) ⟶ {PbSO}_{4} (s) + 4 H_{2} O (l) \end{array}$

$II . HOCl + H_{2} O_{2} ⟶ H_{3} O^{+} + {Cl}^{-} + O_{2}$

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

What is the product of the reaction of

H_{2} O_{2}

with

{Cl}_{2} ?

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

The bond angle

H - O - O

H_{2} O_{2}

in gaseous phase is

MEDIUM

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

Hydrogen peroxide oxidises

{[Fe {(CN)}_{6}]}^{4 -} to {[Fe {(CN)}_{6}]}^{3 -}

in acidic medium, but reduces

{[Fe {(CN)}_{6}]}^{3 -} to {[Fe {(CN)}_{6}]}^{4 -}

in alkaline medium. The other products formed are, respectively

EASY

Chemistry>Inorganic Chemistry>Elements of Group 1 and Group 2>Some Important Compounds of Elements of S-block

From the following statements, choose the incorrect statement regarding

H_{2} O_{2}

An orange coloured solution of K2Cr2O7 acidified with H2SO4 and treated with a substance X gives a blue coloured solution of CrO5. The substance X is

Important Questions on Elements of Group 1 and Group 2

Learn and Prepare for any exam you want !

An orange coloured solution of $K_{2} {Cr}_{2} O_{7}$ acidified with $H_{2} {SO}_{4}$ and treated with a substance $X$ gives a blue coloured solution of ${CrO}_{5}$ . The substance $X$ is