A mixture of potassium chlorate, oxalic acid and sulphuric acid is heated. During the

reaction which element undergoes a maximum change in the oxidation number?

1. S

2. H

3. Cl

4. C

Subtopic:  Oxidizing & Reducing Agents |
 55%
NEET - 2012
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The oxidation states of P in H4P2O5, H4P2O6, H4P2O7, are respectively -

1. +3, +5, +4 2. +5, +3, +4
3. +5, +4, +3 4. +3, +4, +5
Subtopic:  Oxidizing & Reducing Agents |
 85%
From NCERT
NEET - 2010
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Oxidation numbers of P in PO43-, of S in SO42- and that of Cr in Cr2O72- are respectively,

1. +5, +6 and +6                     

2. +3, +6 and +5

3. +5, +3 and +6                     

4. -3, +6 and +6

Subtopic:  Balancing of Equations |
 86%
From NCERT
NEET - 2009
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The number of moles of MnO-4 required to oxidise one mole of ferrous oxalate completely in an acidic medium is-

1. 0.6 mole

2. 0.4 mole

3. 7.5 moles

4. 0.2 mole

Subtopic:  Oxidizing & Reducing Agents | Redox Titration & Type of Redox |
From NCERT
NEET - 2008
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Which of the following oxidation states are the most characteristics for lead and tin respectively?

1. +4, +2                     

2. +2, +4

3. +4, +4                     

4. +2, +2

Subtopic:  Oxidizing & Reducing Agents |
 57%
From NCERT
NEET - 2007
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Which one of the following orders correctly represents the increasing acid strengths of the given acids?

(1) HOCl <HOClO <HOClO< HOClO3

(2) HOClO <HOCl <HOClO<HOClO2

(3) HOClO<HOClO<HOClO <HOCl

(4) HOClO3> HOClO<HOClO <HOCl

Subtopic:  Oxidizing & Reducing Agents |
 75%
NEET - 2007
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HNO2 acts both as reductant and oxidant, while HNO3 acts only as oxidant. It is due to their .

(1) Solubility ability

(2) Maximum oxidation number

(3) Minimum oxidation number

(4) Minimum number of valence electrons

Subtopic:  Oxidizing & Reducing Agents |
 81%
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The valency of Cr in the complex [Cr(H2O)4Cl2]+ [MP PMT 2000]

(1) 1

(2) 3

(3) 5

(4) 6

Subtopic:  Oxidizing & Reducing Agents |
 69%
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In the conversion Br2BrO3, the oxidation state of bromine changes from -

(1) – 1 to – 1

(2) 0 to – 1

(3) 0 to + 5

(4) 0 to – 5

Subtopic:  Oxidizing & Reducing Agents |
 91%
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Oxidation number of cobalt in K[Co(CO)4] is

(1) + 1

(2) + 3

(3) – 1

(4) – 3

Subtopic:  Oxidizing & Reducing Agents |
 73%
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