For the redox reaction MnO4+C2O42+H+Mn2++CO2+H2O the correct coefficients of the reactants for the balanced reaction are 

 

 

MnO4  

C2O42  

H+

(1)  

 2

5

16

(2)

16

5

2

(3)

5

16

2

(4)

2

16

5

Subtopic:  Balancing of Equations |
 81%
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 The strongest oxidising agent among the following is -

1. BrO3/Br2+,Eo=+1.50

2. Fe3+/Fe2+,Eo=+0.76

3. MnO4/Mn2+,Eo=+1.52

4. Cr2O72/Cr3+,Eo=+1.33

Subtopic:  Emf & Electrode Potential |
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In the balanced chemical reaction,

IO3+aI+bH+cH2O+dI2

a, b, c and d respectively correspond to -

(1) 5, 6, 3, 3 

(2) 5, 3, 6, 3

(3) 3, 5, 3, 6

(4) 5, 6, 5, 5

Subtopic:  Application of Electrode Potential |
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The number of moles of KMnO4 reduced by one mole of KI in an alkaline medium is:

1. One fifth

2. five

3. One

4. Two

Subtopic:  Balancing of Equations |
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In the equation

H2S+2HNO32H2O+2NO2+S

The equivalent weight of hydrogen sulphide is [BVP 2003]

(1) 16

(2) 68

(3) 34

(4) 17

Subtopic:  Equivalent Weight |
 64%
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If 1.2 g of metal displace 1.12 litre hydrogen at normal temperature and pressure, equivalent weight of metal would be 

(1) 24

(2) 12

(3) 1.2 ÷ 11.2

(4) 1.2 × 11.2

Subtopic:  Equivalent Weight |
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The equivalent weight of phosphoric acid (H3PO4) in the reaction NaOH+H3PO4NaH2PO4+H2O is

(1) 25

(2) 49

(3) 59

(4) 98

Subtopic:  Equivalent Weight |
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What is the equivalent mass of IO4 when it is converted into I2 in acid medium

(1) M/6

(2) M/7

(3) M/5

(4) M/4

Subtopic:  Equivalent Weight |
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In an alkaline medium ClO2 oxidize H2O2 in O2 and reduces itself in Cl . How many moles of H2O2 will be oxidized by one mole of ClO2?

1. 1.0 2. 1.5
3. 2.5 4. 3.5
Subtopic:  Balancing of Equations |
 59%
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Oxidation number of oxygen in potassium super oxide (KO2) is-

1. – 2

2. – 1

3. – 1/2

4. – 1/4

Subtopic:  Oxidizing & Reducing Agents |
 83%
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