One gm. of a metal carbonate gave 0.56 gm. of its oxide on heating. The equivalent mass of the metal is

1. 40

2. 30

3. 20

4. 10

Subtopic:  Equivalent Weight |
 66%
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The pair of compounds that can exist together is

1. FeCl3, SnCl2             

2. HgCl2, SnCl2

3. FeCl2, SnCl2             

4. FeCl3, KI

Subtopic:  Introduction to Redox and Oxidation Number | Oxidizing & Reducing Agents |
NEET - 2014
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In which of the following compounds, nitrogen exhibits highest oxidation state?

1. N2H                

2. NH3

3. N3H                   

4. NH2OH

Subtopic:  Oxidizing & Reducing Agents |
 54%
From NCERT
NEET - 2012
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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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A mixed solution of potassium hydroxide and sodium carbonate required 15 mL. of an N/20 HCI solution when titrated with phenolphthalein as an indicator. But the same amount of the solution when titrated with methyl orange as an indicator required 25 mL of the same acid. The amount of KOH present in the solution is

(1) 0.014g

(2) 0.14g

(3) 0.028g

(4) 1.4 g

Subtopic:  Equivalent Weight |
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