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CHXI08:REDOX REACTIONS

315369 The oxidant that is used as an antiseptic is

1

{KBrO}_{3}

2

{KMnO}_{4}

3

{CrO}_{3}

4

{KNO}_{3}

CHXI08:REDOX REACTIONS

315370 The most powerful oxidizing agent in the following is

1

H_{3} {BO}_{3}

2

{HPO}_{3}

3

H_{3} {PO}_{4}

4

H_{2} {SO}_{4}

Explanation:

In $H_{2} {SO}_{4}$ , sulphur is in highest oxidation state (+6). Hence, $H_{2} {SO}_{4}$ is strong by oxidising in nature.

CHXI08:REDOX REACTIONS

315371 Which of the following can act as an oxidant both in neutral and alkaline media?

1

K_{2} {Cr}_{2} O_{7}

2

{KMnO}_{4}

3

{Cl}_{2}

4

{CrO}_{3}

Explanation:

${KMnO}_{4}$ behaves as an oxidant in acidic, neutral and alkaline medium.

CHXI08:REDOX REACTIONS

315372 Which statement is not correct?

1 Potassium permanganate is a powerful oxidising substance

2 Potassium permanganate is a weaker oxidising agent than potassium dichromate

3 Potassium permanganate is a stronger oxidising agent than potassium dichromate

4 Potassium dichromate oxidises a secondary alcohol into a ketone.

Explanation:

${M n O}_{4}^{-} + 8 H^{+} + 5 \bar{e} \to M n^{2 +} + 4 H_{2} O$
$E_{{M n O}_{4}^{-} / M n^{2 +}}^{0} = + 1 . 51$
$V C r_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 C r^{3 +} + 7 H_{2} O$
$E_{C_{2} O_{7}^{2 -} {/ C}_{r^{3 +}}^{3}}^{0} = + 1 . 33 V$
More the reduction potential more is the strength of oxidising nature. Thus permanganate is stronger oxidising agent than dichromate.

CHXI08:REDOX REACTIONS

315369 The oxidant that is used as an antiseptic is

1

{KBrO}_{3}

2

{KMnO}_{4}

3

{CrO}_{3}

4

{KNO}_{3}

CHXI08:REDOX REACTIONS

315370 The most powerful oxidizing agent in the following is

1

H_{3} {BO}_{3}

2

{HPO}_{3}

3

H_{3} {PO}_{4}

4

H_{2} {SO}_{4}

Explanation:

In $H_{2} {SO}_{4}$ , sulphur is in highest oxidation state (+6). Hence, $H_{2} {SO}_{4}$ is strong by oxidising in nature.

CHXI08:REDOX REACTIONS

315371 Which of the following can act as an oxidant both in neutral and alkaline media?

1

K_{2} {Cr}_{2} O_{7}

2

{KMnO}_{4}

3

{Cl}_{2}

4

{CrO}_{3}

Explanation:

${KMnO}_{4}$ behaves as an oxidant in acidic, neutral and alkaline medium.

CHXI08:REDOX REACTIONS

315372 Which statement is not correct?

1 Potassium permanganate is a powerful oxidising substance

2 Potassium permanganate is a weaker oxidising agent than potassium dichromate

3 Potassium permanganate is a stronger oxidising agent than potassium dichromate

4 Potassium dichromate oxidises a secondary alcohol into a ketone.

Explanation:

${M n O}_{4}^{-} + 8 H^{+} + 5 \bar{e} \to M n^{2 +} + 4 H_{2} O$
$E_{{M n O}_{4}^{-} / M n^{2 +}}^{0} = + 1 . 51$
$V C r_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 C r^{3 +} + 7 H_{2} O$
$E_{C_{2} O_{7}^{2 -} {/ C}_{r^{3 +}}^{3}}^{0} = + 1 . 33 V$
More the reduction potential more is the strength of oxidising nature. Thus permanganate is stronger oxidising agent than dichromate.

CHXI08:REDOX REACTIONS

315369 The oxidant that is used as an antiseptic is

1

{KBrO}_{3}

2

{KMnO}_{4}

3

{CrO}_{3}

4

{KNO}_{3}

CHXI08:REDOX REACTIONS

315370 The most powerful oxidizing agent in the following is

1

H_{3} {BO}_{3}

2

{HPO}_{3}

3

H_{3} {PO}_{4}

4

H_{2} {SO}_{4}

Explanation:

In $H_{2} {SO}_{4}$ , sulphur is in highest oxidation state (+6). Hence, $H_{2} {SO}_{4}$ is strong by oxidising in nature.

CHXI08:REDOX REACTIONS

315371 Which of the following can act as an oxidant both in neutral and alkaline media?

1

K_{2} {Cr}_{2} O_{7}

2

{KMnO}_{4}

3

{Cl}_{2}

4

{CrO}_{3}

Explanation:

${KMnO}_{4}$ behaves as an oxidant in acidic, neutral and alkaline medium.

CHXI08:REDOX REACTIONS

315372 Which statement is not correct?

1 Potassium permanganate is a powerful oxidising substance

2 Potassium permanganate is a weaker oxidising agent than potassium dichromate

3 Potassium permanganate is a stronger oxidising agent than potassium dichromate

4 Potassium dichromate oxidises a secondary alcohol into a ketone.

Explanation:

${M n O}_{4}^{-} + 8 H^{+} + 5 \bar{e} \to M n^{2 +} + 4 H_{2} O$
$E_{{M n O}_{4}^{-} / M n^{2 +}}^{0} = + 1 . 51$
$V C r_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 C r^{3 +} + 7 H_{2} O$
$E_{C_{2} O_{7}^{2 -} {/ C}_{r^{3 +}}^{3}}^{0} = + 1 . 33 V$
More the reduction potential more is the strength of oxidising nature. Thus permanganate is stronger oxidising agent than dichromate.

CHXI08:REDOX REACTIONS

315369 The oxidant that is used as an antiseptic is

1

{KBrO}_{3}

2

{KMnO}_{4}

3

{CrO}_{3}

4

{KNO}_{3}

CHXI08:REDOX REACTIONS

315370 The most powerful oxidizing agent in the following is

1

H_{3} {BO}_{3}

2

{HPO}_{3}

3

H_{3} {PO}_{4}

4

H_{2} {SO}_{4}

Explanation:

In $H_{2} {SO}_{4}$ , sulphur is in highest oxidation state (+6). Hence, $H_{2} {SO}_{4}$ is strong by oxidising in nature.

CHXI08:REDOX REACTIONS

315371 Which of the following can act as an oxidant both in neutral and alkaline media?

1

K_{2} {Cr}_{2} O_{7}

2

{KMnO}_{4}

3

{Cl}_{2}

4

{CrO}_{3}

Explanation:

${KMnO}_{4}$ behaves as an oxidant in acidic, neutral and alkaline medium.

CHXI08:REDOX REACTIONS

315372 Which statement is not correct?

1 Potassium permanganate is a powerful oxidising substance

2 Potassium permanganate is a weaker oxidising agent than potassium dichromate

3 Potassium permanganate is a stronger oxidising agent than potassium dichromate

4 Potassium dichromate oxidises a secondary alcohol into a ketone.

Explanation:

${M n O}_{4}^{-} + 8 H^{+} + 5 \bar{e} \to M n^{2 +} + 4 H_{2} O$
$E_{{M n O}_{4}^{-} / M n^{2 +}}^{0} = + 1 . 51$
$V C r_{2} O_{7}^{2 -} + 14 H^{+} + 6 e^{-} \to 2 C r^{3 +} + 7 H_{2} O$
$E_{C_{2} O_{7}^{2 -} {/ C}_{r^{3 +}}^{3}}^{0} = + 1 . 33 V$
More the reduction potential more is the strength of oxidising nature. Thus permanganate is stronger oxidising agent than dichromate.

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