AIPMT 2008 | Electrochemistry Question 49 | Chemistry

AIPMT 2008

MCQ (Single Correct Answer)

-1

Standard free energies of formation (in kJ/mol) at 298 K are $$-$$237.2, $$-$$ 394.4 and $$-$$8.2 for H₂O_(l), CO_2(g) and pentane _(g) respectively. The value of E^o_cell for the pentane-oxygen fuel cell is

1.0968 V

0.0968 V

1.968 V

2.0968 V

AIPMT 2007

MCQ (Single Correct Answer)

-1

The equilibrium constant of the reaction:
Cu_(s) + 2Ag⁺_(aq) $$ \to $$ Cu²⁺_(aq) + 2Ag_(s);
E^o = 0.46 V at 298 K is

2.0 $$ \times $$ 10¹⁰

4.0 $$ \times $$ 10¹⁰

4.0 $$ \times $$ 10¹⁵

2.4 $$ \times $$ 10¹⁰

AIPMT 2007

MCQ (Single Correct Answer)

-1

The efficiency of a fuel cell is given by

$$\Delta $$G/$$\Delta $$S

$$\Delta $$G/$$\Delta $$H

$$\Delta $$S/$$\Delta $$G

$$\Delta $$H/$$\Delta $$G

AIPMT 2006

MCQ (Single Correct Answer)

-1

E^o_Fe²⁺/Fe = $$-$$ 0.441 V and E^o_{Fe³⁺/Fe²⁺} = 0.771 V, the standard EMF of the reaction Fe + 2Fe³⁺ $$ \to $$ 3Fe²⁺ will be

0.111 V

0.330 V

1.653 V

1.212 V

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