When 0.1 mol MnO42– is oxidized, the quantity of electricity required to completely oxidise MnO42– to MnO4 is:

1. 96500 C

2. 2 × 96500 C

3. 9650 C

4. 96.50 C

Subtopic:  Faraday’s Law of Electrolysis |
 77%
From NCERT
AIPMT - 2014
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The weight of silver (at.wt. = 108) displaced by a quantity of electricity which displaces 5600 mL of Oat STP will be:

1. 5.4 g

2. 10.8 g

3. 54.0 g

4. 108.0 g

Subtopic:  Faraday’s Law of Electrolysis |
 55%
From NCERT
AIPMT - 2014
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A hydrogen gas electrode is made by dipping platinum wire in a solution of HCl of pH = 10 and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of the electrode would be: 

1. 0.59 V 2. 0.118 V
3. 1.18 V 4. 0.059 V
Subtopic:  Relation between Emf, G, Kc & pH |
 74%
From NCERT
AIPMT - 2013
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At 25 ºC molar conductance of 0.1 molar aqueous solution of ammonium hydroxide is 9.54 ohm–1cm2 mol–1 and at infinite dilution, its molar conductance is 238 ohm–1 cm2 mol–1. The degree of ionization of ammonium hydroxide at the same concentration and temperature are:
1. 20.800%
2. 4.008%
3. 40.800%
4. 2.080%
Subtopic:   Kohlrausch Law & Cell Constant |
 82%
From NCERT
AIPMT - 2013
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A button cell used in watches functions as following
Zn(s) + Ag2O(s) + H2O(l) \(\rightleftharpoons\) 2Ag(s) + Zn2+(aq) + 2OH(aq)
If half-cell potentials are-

Zn2+(aq) + 2e→ Zn(s)  Eo = – 0.76 V 
Ag2O(s) + H2O(l) + 2e → 2Ag(s) + 2OH(aq) Eo = 0.34 V

The cell potential will be:

1. 0.42 V 2. 0.84 V
3. 1.34 V 4. 1.10 V
Subtopic:  Electrode & Electrode Potential |
 86%
From NCERT
AIPMT - 2013
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Limiting molar conductivity of NH4OH (i.e., ΛmNH4OH0 is equal to -

1. ΛmNaOH0+ΛmNaCl0-ΛmNaOH0

2. ΛmNaOH0+ΛmNaCl0-ΛmNH4Cl0

3. ΛmNH4OH0+ΛmNH4Cl0-ΛmHCl0

4. ΛmNH4Cl0+ΛmNaOH0-ΛmNaCl0

Subtopic:   Kohlrausch Law & Cell Constant |
 90%
From NCERT
AIPMT - 2012
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Standard electrode potential of three metals X, Y and Z are -1.2 V, +0.5 V and -3.0 V respectively. The reducing power of these metals will be: 
1. Y > X > Z 2. Z > X > Y
3. X > Y > Z 4. Y > Z > X
Subtopic:  Electrode & Electrode Potential |
 81%
From NCERT
AIPMT - 2011
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If the  Ecell 0for a given reaction has a negative value, then which of the following gives the correct relationship for the values of G0  and   Keq?

1.  G0<0; Keq>1

2.  G0<0; Keq<1

3.  G0>0; Keq<1

4.  G0>0; Keq>1

Subtopic:  Electrolytic & Electrochemical Cell | Relation between Emf, G, Kc & pH |
 78%
From NCERT
AIPMT - 2011
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Based on electrode potentials in the table below: 
Cu2+(aq) + e- → Cu+(aq) 0.15 V
Cu+(aq) + e- → Cu(s) 0.50 V

The value of \(E_{Cu^{2+}/Cu}^{o}\) will be:
1. 0.325 V 2. 0650 V
3. 0.150 V 4. 0.500 V
Subtopic:  Electrode & Electrode Potential |
 60%
From NCERT
AIPMT - 2011
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Standard electrode potential for Sn4+/Sn2+ couple is +0.15 V and that for Cr3+/Cr couple is -0.74. These two couples in their standard state are connected to make a cell. The cell potential will be:

1. +0.89 V

2. +0.18 V

3. +1.83 V

4. +1.199 V

Subtopic:  Electrode & Electrode Potential |
 90%
From NCERT
AIPMT - 2011
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