St. Britto Hr. Sec. School - Madurai
12th Chemistry Monthly Test - 1 ( Electro Chemistry )-Aug 2020
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When \({ \lambda }_{ c }\) decreases linearly with increase in \(\sqrt { C } \) , then it is
an insulator
a semiconductor
a weak electrolyte
a strong electrolyte
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The reaction that takes place in the cathode half cell in a Galvanic cell is_______
oxidation
reduction
redox
hydrolysis
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The zinc - copper cell has emf of______
1V
2.1V
1.1 V
-1.1 V
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For a uni - univalent electrolyte, write the Debye - Huckel Onsagar equation.
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Define electrolysis.
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State Kohlrausch Law. How is it useful to determine the molar conductivity of weak electrolyte at infinite dilution?
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Give the expression that relates molar conductivity and degree of dissociation.
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Give an example of secondary cell.
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On what does the emf of a lead storage battery depend?
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Define specific conductance.
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What is meant by limiting molar conductivity?
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State Faraday’s Laws of electrolysis
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How are specific and equivalent conductances related?
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Two metals M1 and M2 have reduction potential values of -xV and +y V respectively. Which will liberate H2 and H2SO4?
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Write a note on sacrificial protection.
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Define electrochemical equivalent.
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A copper electrode is dipped in 0.1 M copper sulphate solution at 25°C. Calculate the electrode potential of copper.
[Given : \({ E }_{ Cu^{ 2+ }|Cu }\) = 0.34] -
Why is AC current used instead of DC in measuring the electrolytic conductance?
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Define resistivity.
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Explain how iron is protected from corrosion by coating with magnesium.
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The standard reduction potential of Fe3+, Fe2+ I Pt is + 0. 771 V. This half cell is connected with another half cell such that emf of the cell is 0. 771 V. What is the other half cell?
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State Ohms law.
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Explain why Zn on reaction with dil. H2SO4 liberate hydrogen, whereas copper cannot?
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Define Faraday.
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Give the oxidation and reduction half cell reaction taking place in the Daniel cell.
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0.1 M ·solution of two electrolytes P and Q have specific conductance 4 x I0-4 S cm-1 and 6 x I0-6 S cm-1 respectively. Which among the following will have greater resistance to the flow of current? Give reason.
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Corrosion of aluminum takes place at a much slower rate than iron. Give reason.
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What are the types of changes in the cathode and anode in electrolytic and electrochemical cells?
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Ledanche cell is a non-rechargeable cell. Answer the questions below with respect to Leclanche cell.
(i) Anode
(ii) Cathode
(iii) Electrolyte
(iv) Oxidation half cell reaction
( v) Reduction half cell reaction. -
Write the overall redox reaction for the zinc-copper cell. Show the oxidation and reduction half reaction.
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Explain the relationship between free energy of the cell and Its emf.
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Explain the process of recharging of lead storage battery.
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How will you calculate solubility product of AgCl which is a sparingly soluble salt?
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Derive a relationship between dissociation constant Ka and molar conductivity \({ \Lambda }_{ m }\).
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Write an account on cell terminology.
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Write the electrochemical mechanism of corrosion.
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Explain SHE as a reference electrode.
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How will you determine the conductivity of an electrolytic solution using a wheatstone bridge?
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