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CHXI09:HYDROGEN

315586 Which of the following equations depict the oxidising nature of $H_{2} O_{2}$ ?

1

2 {MnO}_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} \to 2 {Mn}^{2 +} + 8 H_{2} O + 5 O_{2}

2

2 {Fe}^{3 +} + 2 H^{+} + H_{2} O_{2} \to 2 {Fe}^{2 +} + 2 H_{2} O + O_{2}

3

2 I^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O

4

{KIO}_{4} + H_{2} O_{2} \to {KIO}_{3} + H_{2} O + O_{2}

Explanation:

In oxidising properties $H_{2} O_{2}$ is formed.

CHXI09:HYDROGEN

315587 Which is not correct when chromium hydroxide is treated with $H_{2} O_{2}$ in the presence of $NaOH$ ?

1

Cr (OH)_{3}

precipitate is converted into soluble sodium chromate

2 The solution acquires yellow colour

3 oxidation state of

{Cr}^{3 +}

is changed to

{Cr}^{6 +}

4

H_{2} O_{2}

acts as a reducing agent

Explanation:

$H_{2} O_{2}$ oxidises ${Cr}^{3 +}$ to ${Cr}^{6 +}$

CHXI09:HYDROGEN

315588 $H_{2} O_{2}$ restores the colour of old oily paintings, blackened by the action of $H_{2} S$ gas by

1 Converting

{PbO}_{2}

to

Pb

2 By oxidising

PbS

to

{PbSO}_{4}

3 Converting

{PbCO}_{3}

to

Pb

4 Oxidising

{PbSO}_{3}

to

{PbSO}_{4}

Explanation:

$PbS + 4 H_{2} O_{2} \to {PbSO}_{4} + 4 H_{2} O$

CHXI09:HYDROGEN

315589 Assertion :
Reactions of $H_{2} O_{2}$ are fast in basic medium
Reason :
Bases increases the stability of $H_{2} O_{2}$

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI09:HYDROGEN

315590 The product of the reaction between $H_{2} O_{2}$ and ${Cl}_{2}$ is

1

O_{2} + HOCl

2

2 HCl + O_{2}

3

H_{2} O + HCl

4

HCl + H_{2}

Explanation:

$H_{2} O_{2} + {Cl}_{2} \to 2 HCl + O_{2}$

CHXI09:HYDROGEN

315586 Which of the following equations depict the oxidising nature of $H_{2} O_{2}$ ?

1

2 {MnO}_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} \to 2 {Mn}^{2 +} + 8 H_{2} O + 5 O_{2}

2

2 {Fe}^{3 +} + 2 H^{+} + H_{2} O_{2} \to 2 {Fe}^{2 +} + 2 H_{2} O + O_{2}

3

2 I^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O

4

{KIO}_{4} + H_{2} O_{2} \to {KIO}_{3} + H_{2} O + O_{2}

Explanation:

In oxidising properties $H_{2} O_{2}$ is formed.

CHXI09:HYDROGEN

315587 Which is not correct when chromium hydroxide is treated with $H_{2} O_{2}$ in the presence of $NaOH$ ?

1

Cr (OH)_{3}

precipitate is converted into soluble sodium chromate

2 The solution acquires yellow colour

3 oxidation state of

{Cr}^{3 +}

is changed to

{Cr}^{6 +}

4

H_{2} O_{2}

acts as a reducing agent

Explanation:

$H_{2} O_{2}$ oxidises ${Cr}^{3 +}$ to ${Cr}^{6 +}$

CHXI09:HYDROGEN

315588 $H_{2} O_{2}$ restores the colour of old oily paintings, blackened by the action of $H_{2} S$ gas by

1 Converting

{PbO}_{2}

to

Pb

2 By oxidising

PbS

to

{PbSO}_{4}

3 Converting

{PbCO}_{3}

to

Pb

4 Oxidising

{PbSO}_{3}

to

{PbSO}_{4}

Explanation:

$PbS + 4 H_{2} O_{2} \to {PbSO}_{4} + 4 H_{2} O$

CHXI09:HYDROGEN

315589 Assertion :
Reactions of $H_{2} O_{2}$ are fast in basic medium
Reason :
Bases increases the stability of $H_{2} O_{2}$

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI09:HYDROGEN

315590 The product of the reaction between $H_{2} O_{2}$ and ${Cl}_{2}$ is

1

O_{2} + HOCl

2

2 HCl + O_{2}

3

H_{2} O + HCl

4

HCl + H_{2}

Explanation:

$H_{2} O_{2} + {Cl}_{2} \to 2 HCl + O_{2}$

CHXI09:HYDROGEN

315586 Which of the following equations depict the oxidising nature of $H_{2} O_{2}$ ?

1

2 {MnO}_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} \to 2 {Mn}^{2 +} + 8 H_{2} O + 5 O_{2}

2

2 {Fe}^{3 +} + 2 H^{+} + H_{2} O_{2} \to 2 {Fe}^{2 +} + 2 H_{2} O + O_{2}

3

2 I^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O

4

{KIO}_{4} + H_{2} O_{2} \to {KIO}_{3} + H_{2} O + O_{2}

Explanation:

In oxidising properties $H_{2} O_{2}$ is formed.

CHXI09:HYDROGEN

315587 Which is not correct when chromium hydroxide is treated with $H_{2} O_{2}$ in the presence of $NaOH$ ?

1

Cr (OH)_{3}

precipitate is converted into soluble sodium chromate

2 The solution acquires yellow colour

3 oxidation state of

{Cr}^{3 +}

is changed to

{Cr}^{6 +}

4

H_{2} O_{2}

acts as a reducing agent

Explanation:

$H_{2} O_{2}$ oxidises ${Cr}^{3 +}$ to ${Cr}^{6 +}$

CHXI09:HYDROGEN

315588 $H_{2} O_{2}$ restores the colour of old oily paintings, blackened by the action of $H_{2} S$ gas by

1 Converting

{PbO}_{2}

to

Pb

2 By oxidising

PbS

to

{PbSO}_{4}

3 Converting

{PbCO}_{3}

to

Pb

4 Oxidising

{PbSO}_{3}

to

{PbSO}_{4}

Explanation:

$PbS + 4 H_{2} O_{2} \to {PbSO}_{4} + 4 H_{2} O$

CHXI09:HYDROGEN

315589 Assertion :
Reactions of $H_{2} O_{2}$ are fast in basic medium
Reason :
Bases increases the stability of $H_{2} O_{2}$

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI09:HYDROGEN

315590 The product of the reaction between $H_{2} O_{2}$ and ${Cl}_{2}$ is

1

O_{2} + HOCl

2

2 HCl + O_{2}

3

H_{2} O + HCl

4

HCl + H_{2}

Explanation:

$H_{2} O_{2} + {Cl}_{2} \to 2 HCl + O_{2}$

CHXI09:HYDROGEN

315586 Which of the following equations depict the oxidising nature of $H_{2} O_{2}$ ?

1

2 {MnO}_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} \to 2 {Mn}^{2 +} + 8 H_{2} O + 5 O_{2}

2

2 {Fe}^{3 +} + 2 H^{+} + H_{2} O_{2} \to 2 {Fe}^{2 +} + 2 H_{2} O + O_{2}

3

2 I^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O

4

{KIO}_{4} + H_{2} O_{2} \to {KIO}_{3} + H_{2} O + O_{2}

Explanation:

In oxidising properties $H_{2} O_{2}$ is formed.

CHXI09:HYDROGEN

315587 Which is not correct when chromium hydroxide is treated with $H_{2} O_{2}$ in the presence of $NaOH$ ?

1

Cr (OH)_{3}

precipitate is converted into soluble sodium chromate

2 The solution acquires yellow colour

3 oxidation state of

{Cr}^{3 +}

is changed to

{Cr}^{6 +}

4

H_{2} O_{2}

acts as a reducing agent

Explanation:

$H_{2} O_{2}$ oxidises ${Cr}^{3 +}$ to ${Cr}^{6 +}$

CHXI09:HYDROGEN

315588 $H_{2} O_{2}$ restores the colour of old oily paintings, blackened by the action of $H_{2} S$ gas by

1 Converting

{PbO}_{2}

to

Pb

2 By oxidising

PbS

to

{PbSO}_{4}

3 Converting

{PbCO}_{3}

to

Pb

4 Oxidising

{PbSO}_{3}

to

{PbSO}_{4}

Explanation:

$PbS + 4 H_{2} O_{2} \to {PbSO}_{4} + 4 H_{2} O$

CHXI09:HYDROGEN

315589 Assertion :
Reactions of $H_{2} O_{2}$ are fast in basic medium
Reason :
Bases increases the stability of $H_{2} O_{2}$

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI09:HYDROGEN

315590 The product of the reaction between $H_{2} O_{2}$ and ${Cl}_{2}$ is

1

O_{2} + HOCl

2

2 HCl + O_{2}

3

H_{2} O + HCl

4

HCl + H_{2}

Explanation:

$H_{2} O_{2} + {Cl}_{2} \to 2 HCl + O_{2}$

CHXI09:HYDROGEN

315586 Which of the following equations depict the oxidising nature of $H_{2} O_{2}$ ?

1

2 {MnO}_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} \to 2 {Mn}^{2 +} + 8 H_{2} O + 5 O_{2}

2

2 {Fe}^{3 +} + 2 H^{+} + H_{2} O_{2} \to 2 {Fe}^{2 +} + 2 H_{2} O + O_{2}

3

2 I^{-} + 2 H^{+} + H_{2} O_{2} \to I_{2} + 2 H_{2} O

4

{KIO}_{4} + H_{2} O_{2} \to {KIO}_{3} + H_{2} O + O_{2}

Explanation:

In oxidising properties $H_{2} O_{2}$ is formed.

CHXI09:HYDROGEN

315587 Which is not correct when chromium hydroxide is treated with $H_{2} O_{2}$ in the presence of $NaOH$ ?

1

Cr (OH)_{3}

precipitate is converted into soluble sodium chromate

2 The solution acquires yellow colour

3 oxidation state of

{Cr}^{3 +}

is changed to

{Cr}^{6 +}

4

H_{2} O_{2}

acts as a reducing agent

Explanation:

$H_{2} O_{2}$ oxidises ${Cr}^{3 +}$ to ${Cr}^{6 +}$

CHXI09:HYDROGEN

315588 $H_{2} O_{2}$ restores the colour of old oily paintings, blackened by the action of $H_{2} S$ gas by

1 Converting

{PbO}_{2}

to

Pb

2 By oxidising

PbS

to

{PbSO}_{4}

3 Converting

{PbCO}_{3}

to

Pb

4 Oxidising

{PbSO}_{3}

to

{PbSO}_{4}

Explanation:

$PbS + 4 H_{2} O_{2} \to {PbSO}_{4} + 4 H_{2} O$

CHXI09:HYDROGEN

315589 Assertion :
Reactions of $H_{2} O_{2}$ are fast in basic medium
Reason :
Bases increases the stability of $H_{2} O_{2}$

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but reason is correct.

CHXI09:HYDROGEN

315590 The product of the reaction between $H_{2} O_{2}$ and ${Cl}_{2}$ is

1

O_{2} + HOCl

2

2 HCl + O_{2}

3

H_{2} O + HCl

4

HCl + H_{2}

Explanation:

$H_{2} O_{2} + {Cl}_{2} \to 2 HCl + O_{2}$