03. ELECTROCHEMISTRY[KARNATAKA CET EXCLUSIVE]
CHEMISTRY(KCET)

285379 Solubility product of\(\mathrm{CaC}_2 \mathrm{O}_4\) at a given temperature in pure water is \(4 \times 10^{-9}\left(\mathrm{~mol} \mathrm{~L}^{-1}\right)^2\). Solubility of \(\mathrm{CaC}_2 \mathrm{O}_4\) at the same temperature is:

1 \(6.3 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
2 \(2 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
3 \(2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
4 \(6.3 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
CHEMISTRY(KCET)

285380 A current of 3 A is passed through a molten calcium salt for 1 hr 47 min 13 sec . The mass of calcium deposited is: (Molar mass of\(\mathrm{Ca}=40 \mathrm{~g} \mathrm{~mol}^{-1}\) )

1 6.0 g
2 2.0 g
3 8.0 g
4 4.0 g
CHEMISTRY(KCET)

285381 The value of '\(A\) ' in the equation \(\lambda_m=\lambda_m^0-A \sqrt{C}\) is same for the pair:

1 NaCl and\(\mathrm{CaCl}_2\)
2 \(\mathrm{CaCl}_2\) and \(\mathrm{MgSO}_4\)
3 NaCl and KBr
4 \(\mathrm{MgCl}_2\) and NaCl
CHEMISTRY(KCET)

285382 The resistance of 0.1 M weak acid\(\mathrm{H} \AA\) in a conductivity cell is \(2 \times 10^3 \mathrm{Ohm}\). The cell constant of the cell is \(0.78 \mathrm{C} \mathrm{m}^{-1}\) and \(\lambda_{\mathrm{m}}^{\circ}\) of acid HA is 390 S \(\mathrm{cm}^2 \mathrm{~mol}^{-1}\). The pH of the solution is

1 3.3
2 4.2
3 5
4 3
CHEMISTRY(KCET)

285379 Solubility product of\(\mathrm{CaC}_2 \mathrm{O}_4\) at a given temperature in pure water is \(4 \times 10^{-9}\left(\mathrm{~mol} \mathrm{~L}^{-1}\right)^2\). Solubility of \(\mathrm{CaC}_2 \mathrm{O}_4\) at the same temperature is:

1 \(6.3 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
2 \(2 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
3 \(2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
4 \(6.3 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
CHEMISTRY(KCET)

285380 A current of 3 A is passed through a molten calcium salt for 1 hr 47 min 13 sec . The mass of calcium deposited is: (Molar mass of\(\mathrm{Ca}=40 \mathrm{~g} \mathrm{~mol}^{-1}\) )

1 6.0 g
2 2.0 g
3 8.0 g
4 4.0 g
CHEMISTRY(KCET)

285381 The value of '\(A\) ' in the equation \(\lambda_m=\lambda_m^0-A \sqrt{C}\) is same for the pair:

1 NaCl and\(\mathrm{CaCl}_2\)
2 \(\mathrm{CaCl}_2\) and \(\mathrm{MgSO}_4\)
3 NaCl and KBr
4 \(\mathrm{MgCl}_2\) and NaCl
CHEMISTRY(KCET)

285382 The resistance of 0.1 M weak acid\(\mathrm{H} \AA\) in a conductivity cell is \(2 \times 10^3 \mathrm{Ohm}\). The cell constant of the cell is \(0.78 \mathrm{C} \mathrm{m}^{-1}\) and \(\lambda_{\mathrm{m}}^{\circ}\) of acid HA is 390 S \(\mathrm{cm}^2 \mathrm{~mol}^{-1}\). The pH of the solution is

1 3.3
2 4.2
3 5
4 3
CHEMISTRY(KCET)

285379 Solubility product of\(\mathrm{CaC}_2 \mathrm{O}_4\) at a given temperature in pure water is \(4 \times 10^{-9}\left(\mathrm{~mol} \mathrm{~L}^{-1}\right)^2\). Solubility of \(\mathrm{CaC}_2 \mathrm{O}_4\) at the same temperature is:

1 \(6.3 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
2 \(2 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
3 \(2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
4 \(6.3 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
CHEMISTRY(KCET)

285380 A current of 3 A is passed through a molten calcium salt for 1 hr 47 min 13 sec . The mass of calcium deposited is: (Molar mass of\(\mathrm{Ca}=40 \mathrm{~g} \mathrm{~mol}^{-1}\) )

1 6.0 g
2 2.0 g
3 8.0 g
4 4.0 g
CHEMISTRY(KCET)

285381 The value of '\(A\) ' in the equation \(\lambda_m=\lambda_m^0-A \sqrt{C}\) is same for the pair:

1 NaCl and\(\mathrm{CaCl}_2\)
2 \(\mathrm{CaCl}_2\) and \(\mathrm{MgSO}_4\)
3 NaCl and KBr
4 \(\mathrm{MgCl}_2\) and NaCl
CHEMISTRY(KCET)

285382 The resistance of 0.1 M weak acid\(\mathrm{H} \AA\) in a conductivity cell is \(2 \times 10^3 \mathrm{Ohm}\). The cell constant of the cell is \(0.78 \mathrm{C} \mathrm{m}^{-1}\) and \(\lambda_{\mathrm{m}}^{\circ}\) of acid HA is 390 S \(\mathrm{cm}^2 \mathrm{~mol}^{-1}\). The pH of the solution is

1 3.3
2 4.2
3 5
4 3
CHEMISTRY(KCET)

285379 Solubility product of\(\mathrm{CaC}_2 \mathrm{O}_4\) at a given temperature in pure water is \(4 \times 10^{-9}\left(\mathrm{~mol} \mathrm{~L}^{-1}\right)^2\). Solubility of \(\mathrm{CaC}_2 \mathrm{O}_4\) at the same temperature is:

1 \(6.3 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
2 \(2 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}\)
3 \(2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
4 \(6.3 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\)
CHEMISTRY(KCET)

285380 A current of 3 A is passed through a molten calcium salt for 1 hr 47 min 13 sec . The mass of calcium deposited is: (Molar mass of\(\mathrm{Ca}=40 \mathrm{~g} \mathrm{~mol}^{-1}\) )

1 6.0 g
2 2.0 g
3 8.0 g
4 4.0 g
CHEMISTRY(KCET)

285381 The value of '\(A\) ' in the equation \(\lambda_m=\lambda_m^0-A \sqrt{C}\) is same for the pair:

1 NaCl and\(\mathrm{CaCl}_2\)
2 \(\mathrm{CaCl}_2\) and \(\mathrm{MgSO}_4\)
3 NaCl and KBr
4 \(\mathrm{MgCl}_2\) and NaCl
CHEMISTRY(KCET)

285382 The resistance of 0.1 M weak acid\(\mathrm{H} \AA\) in a conductivity cell is \(2 \times 10^3 \mathrm{Ohm}\). The cell constant of the cell is \(0.78 \mathrm{C} \mathrm{m}^{-1}\) and \(\lambda_{\mathrm{m}}^{\circ}\) of acid HA is 390 S \(\mathrm{cm}^2 \mathrm{~mol}^{-1}\). The pH of the solution is

1 3.3
2 4.2
3 5
4 3