In the following unbalanced reaction

A2+ + B3+ A4+ + B

The total number of e- transferred during reaction is 

1. 2

2. 3

3. 6

4. 8

 

 

Subtopic:  Oxidizing & Reducing Agents | Application of Electrode Potential |
 63%
From NCERT
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What will be the value of x and y by balancing the reaction

C2H5OH + X I2 + Y OH- CHI3 + HCO2- + 5I- + 5H2O

1. 4,6

2. 2,6

3. 2,4

4.  4,4

Subtopic:  Application of Electrode Potential |
 69%
From NCERT
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In the given reaction,

xBrO3- + yCr+3 + zH2Br2 + CrO42- + H+

The coefficients x, y, and z are respectively-

1. 6, 10, 11

2. 6, 10, 20

3. 6, 8, 22

4. 6, 10, 22

Subtopic:  Oxidizing & Reducing Agents | Balancing of Equations | Application of Electrode Potential |
 59%
From NCERT
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In the following reaction

Al + Fe3O4 Al2O3 + Fe

The total number of electrons transferred will be-

1. 6

2. 8

3. 8/3

4. 24

Subtopic:  Application of Electrode Potential |
From NCERT
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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 |
 76%
From NCERT
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From the following, identify the reaction having the top position in the EMF series (standard reduction potential) according to their electrode potential at 298 K.

1. Mg2++ 2eMg(s)
2. Fe2+ + 2e Fe(s)
3. Au3++ 3eAu(s)
4. K++ le K(s)

Subtopic:  Application of Electrode Potential |
From NCERT
NEET - 2020
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Standard electrode potentials are:

Fe+2/Fe , E° = -0.44 

 Fe+3/Fe+2 ,E° = 0.77

Choose the correct observation if Fe+2, Fe+3, and Fe  block are kept together:

1. Fe+3 increases 

2. Fe+3 decreases 

3. Fe+2Fe+3 remains unchanged 

4. Fe+2 decreases

Subtopic:  Application of Electrode Potential | Emf & Electrode Potential |
 64%
From NCERT
AIPMT - 2001
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Consider the given data:

EFe3+/Fe2+=0.77; EI-/I2= -0.54
EAg+/Ag=0.80; ECu/Cu2+= -0.34
EFe3+/Fe2+=0.77; ECu/Cu2+= -0.34
EAg/Ag+=-0.80; EFe3+/Fe2+=0.77

Using the electrode potential values given above, identify the reaction which is not feasible:

1. Fe3+(aq) and I- aq)
2. Ag+(aq) and Cu(s)
3. Fe3+(aq) and Cu(s)
4. Ag(s) and Fe3+(aq)

Subtopic:  Application of Electrode Potential |
 61%
From NCERT
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Arrange the metals Al, Cu, Fe, Mg, and Zn in the correct decreasing order based on their ability to displace each other from the solution of their salts:
1. Al> Zn > Fe > Cu > Mg

2. Zn > Fe > Cu > Mg > Al

3. Mg > Al > Zn > Fe > Cu

4. Fe > Mg > Zn > Al > Cu

Subtopic:  Application of Electrode Potential |
 71%
From NCERT
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The correct statement about the electrolysis of an aqueous solution of AgNO3 with Ag electrode is-

1. Ag+ ion gets oxidised at cathode; Ag(s) is reduced at anode
2. H2O gets reduced at cathode; H2O gets oxidised at anode
3. Ag+ ion gets reduced at cathode; H2O is oxidised at anode
4. Ag+ ion gets reduced at cathode; Ag(s) is oxidised at anode

Subtopic:  Application of Electrode Potential |
From NCERT
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