AIPMT 2004 | Electrochemistry Question 62 | Chemistry

The standard e.m.f. of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at 25^oC. The equilibrium constant of the reaction would be

2.0 $$ \times $$ 10¹¹

4.0 $$ \times $$ 10¹²

1.0 $$ \times $$ 10²

1.0 $$ \times $$ 10¹⁰

AIPMT 2003

MCQ (Single Correct Answer)

-1

On the basis of the information available from the reaction,

4/3Al + O₂ $$ \to $$ 2/3Al₂O₃, $$\Delta $$G = $$-$$ 827 kJ mol^$$-$$1 of O₂,

the minimum e.m.f. required to carry out an electrolysis of Al₂O₃ is
(F = 96500 C mol^$$-$$1)

2.14 V

4.28 V

6.42 V

8.56 V

AIPMT 2003

MCQ (Single Correct Answer)

-1

The e.m.f. of a Daniell cell at 298 K is E₁.
AIPMT 2003 Chemistry - Electrochemistry Question 27 English

When the concentration of ZnSO₄ is 1.0 M and that of CuSO₄ is 0.01 M, the e.m.f. changed to E₂. What is the relationship between E₁ and E₂?

E₁ > E₂

E₁ < E₂

E₁ = E₂

E₂ = 0 $$ \ne $$ E₁

AIPMT 2002

MCQ (Single Correct Answer)

-1

In electrolysis of NaCl when Pt electrode is taken then H₂ is liberated at cathode while with Hg cathode it forms sodium amalgam

Hg is more inert than Pt

More voltage is required to reduce H⁺ at Hg than at Pt

Na is dissolved in Hg while it does not dissolve in Pt

Conc. of H⁺ ions is larger when Pt electrode is taken.

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