AIPMT 2009 | Electrochemistry Question 51 | Chemistry

The equivalent conductance of M/32 solution of a weak monobasic acid is 8.0 mho cm² and at infinite dilution is 400 mho cm². The dissociation constant of this acid is

1.25 $$ \times $$ 10^$$-$$6

6.25 $$ \times $$ 10^$$-$$4

1.25 $$ \times $$ 10^$$-$$4

1.25 $$ \times $$ 10^$$-$$5

AIPMT 2009

MCQ (Single Correct Answer)

-1

Al₂O₃ is reduced by electrolysis at low potentials and high currents. If 4.0 $$ \times $$ 10⁴ amperes of current is passed through molten Al₂O₃ for 6 hours, what mass of aluminium is product? (Assume 100% current efficiency, at mass of Al = 27 g mol^$$-$$1).

8.1 $$ \times $$ 10⁴ g

2.4 $$ \times $$ 10⁵ g

1.3 $$ \times $$ 10⁴ g

9.0 $$ \times $$ 10³ g

AIPMT 2008

MCQ (Single Correct Answer)

-1

Kohlrausch's law states that at

Infinite dilution, each ion makes definite contribution to conductance of an electrolyte whatever be the nature of the other ion of the electrolyte

Infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte

Finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte

Infinite dilution each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte.

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

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