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Electrochemistry

Long Answer Type

121. Define the terms equivalent and molar conductivity. What are their physical signific-ance?

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Short Answer Type

122. How is molar conductivity related to concentration of an electrolyte? How will you explain a weak and a strong electrolyte based on their conductivity values?

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123. What is corrosion? What are the factors which effect corrosions? CO₂ is always present in natural water. Explain its affect (increases, stops or no effect > on rusting of Fe.)

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124. What is a salt bridge? What is its significance?

186 Views

Long Answer Type

125.

What is corrosion? Describe the electrochemical phenomenon of rusting of iron.

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126. Explain why electrolysis of aqueous solution of NaCl gives H₂ at cathode and Cl₂ at anode. Write overall reaction.

3952 Views

Short Answer Type

127.

The following curve is obtained when molar conductivity λ_m (y-axis) is plotted against the square root of concentration C^1/2 (x-axis) for two electrolytes A and B.
(a) What can you about the nature of the two electrolytes A and B.
(b) How do you account for the increase in molar conductivity λ_m for the electrolytes A and B on dilution.

419 Views

128. How is the standard free energy change related to
(i) emf of a galvanic cell related to the reaction.
(ii) equilibrium constant of the reaction in equilibrium state?

(i) The relation between free energy change and emf of a galvanic cell of the reaction is given as
ΔG = – nFE_cell(ii) The relation between free energy change and equilibrium constant of the reaction is given by
ΔG = – 2.303 RT log K_c.

135 Views