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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The Gibb's energy for the decomposition of \(\mathrm{A l_{2} O_{3}}\) at \(\mathrm{500~ ^\circ C}\) is as follows: 

2/3Al2O3 → 4/3Al + O2 ; ∆rG = + 960 k J mol–1

The potential difference needed for the electrolytic reduction of aluminium oxide (Al2O3) at \(\mathrm{500~ ^\circ C}\) is at least,

1. 3.0 V 

2. 2.5 V 

3. 5.0 V 

4. 4.5 V 

Subtopic:  Relation between Emf, G, Kc & pH |
 61%
From NCERT
AIPMT - 2012
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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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Given:
(i) Cu2++2e-Cu    Eo = 0.337 V 
(ii) Cu2++e-Cu+  Eo = 0.153 V 
Electrode potential, Eo for the reaction, 
Cu++e-Cu, will be: 

1. 0.52 V

2. 0.90 V

3. 0.30 V

4. 0.38 V

Subtopic:  Relation between Emf, G, Kc & pH |
 75%
From NCERT
AIPMT - 2009
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The correct order of ionic mobility of ions in an aqueous solution is:
1. K+> Na+> Rb+> Cs+
2. Cs+> Rb+> K+> Na+
3. Rb+> K+> Cs+> Na+
4. Na+> K+> Rb+> Cs+
Subtopic:  Relation between Emf, G, Kc & pH |
 75%
From NCERT
AIPMT - 2008
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For a given reaction, 
Cu(s) + 2Ag+ (aq) → Cu2+(aq)+2Ag(s); 
E0=0.46 V at 298 K . The equilibrium constant will be :

1. 2.4×1010

2. 2.0×1010

3. 4.0×1010

4. 4.0×1015

Subtopic:  Nernst Equation | Relation between Emf, G, Kc & pH |
 62%
From NCERT
AIPMT - 2007
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