NEET Chemistry: Electrochemistry — Practice Set 10

Q1. The conductivity of a 0.005 M KBr solution is 0.00072 S cm\(^{-1}\). What is the molar conductivity?

Q2. What is the standard Gibbs energy change for a cell with \( E^\circ_{cell} = 0.77 \, V \) and 2 electrons transferred? (F = 96500 C/mol)

Q3. How many electrons are involved in the reduction of 1 mole of \( Cr_2O_7^{2-} \) to \( Cr^{3+} \) in acidic medium?

Q4. How many Faradays are required to deposit 5.85 g of sodium from NaNO\(_3\) solution? (Atomic mass of Na = 23 g/mol)

Q5. What is the potential of a hydrogen electrode in a solution with \( [H^+] = 10^{-3} \, M \) at 298 K? (Given: \( E^\circ_{H^+/H_2} = 0.00 \, V \))

Q6. A conductivity cell with cell constant 0.4 cm\(^{-1}\) shows a resistance of 250 Ω with a 0.02 M NaCl solution. What is the molar conductivity?

Q7. In electrolysis of molten CaCl\(_2\), 0.4 g of Ca (atomic mass 40 g/mol) is deposited. What volume of Cl\(_2\) gas (STP) is produced at the anode? (F = 96500 C/mol)

Q8. How many Faradays are required to deposit 0.295 g of cobalt from CoCl\(_2\) solution? (Atomic mass of Co = 59 g/mol)

Q9. In a mercury cell, what acts as the cathode during discharge?

Q10. A cell \( Ni(s) | Ni^{2+}(0.001 \, M) || Cl_2(g)(2 \, atm) | Cl^-(0.1 \, M) | Pt(s) \) operates at 298 K. What is the cell potential? (Given: \( E^\circ_{Ni^{2+}/Ni} = -0.25 \, V \), \( E^\circ_{Cl_2/Cl^-} = 1.36 \, V \))

Chemistry — Electrochemistry

Set 10 of 20

15:00

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1Question 1 of 10
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The conductivity of a 0.005 M KBr solution is 0.00072 S cm\(^{-1}\). What is the molar conductivity?