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

285400 For a cell involving two electron changes,\(E_{\text {cell }}^{\circ}=\) 0.3 V at \(25^{\circ} \mathrm{C}\). The equilibrium constant of the reaction is

1 \(10^{-10}\)
2 \(3 \times 10^{-2}\)
3 10
4 \(10^{10}\)
Karnataka CET 2018
CHEMISTRY(KCET)

285401 By passing electric current,\(\mathrm{NaClO}_3\) is converted into \(\mathrm{NaClO}_4\) according to the following equation:

\(\mathrm{NaClO}_3+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{NaClO}_4+\mathrm{H}_2\)
How many moles of \(\mathrm{NaClO}_4\) will be formed when three faradays of charge is passed through \(\mathrm{NaClO}_3\) ?

1 0.75
2 3.0
3 1.5
4 1.0
Karnataka CET 2017
CHEMISTRY(KCET)

285402 In the electrolysis of aqueous sodium chloride solution, which of the half cell reaction will occur at anode?

1 \(\mathrm{Cl}^{-}(\)aq \() \rightarrow \frac{1}{2} \mathrm{Cl}_2+e^{-}\);
\(E_{\mathrm{cell}}^{\circ}=1.36 \text { volts }\)
2 \(2 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{O}_2+4 \mathrm{H}^{+}+4 \mathrm{e}^{-}\); \(E_{\text {cell }}^{\circ}=1.23\) volts
3 \(\mathrm{Na}^{+}(\)aq \()+e^{-} \rightarrow \mathrm{Na}(\mathrm{s})\);
\(E^{\circ}=-2.71\) volts
4 \(\mathrm{H}^{+}(\)aq \()+e^{-} \rightarrow \frac{1}{2} \mathrm{H}_2\);
\(E_{\text {cell }}^{\circ}=0.00 \text { volts }\)
Karnataka CET 2017
CHEMISTRY(KCET)

285403 Which of the following is incorrect in a galvanic cell?

1 Oxidation occurs at anode.
2 Reduction occurs at cathode.
3 The electrode at which electrons are gained is called cathode.
4 The electrode at which electrons are lost is called cathode.
Karnataka CET 2016
CHEMISTRY(KCET)

285404 A secondary cell is one which

1 can be recharged
2 can be recharged by passing current through it in the same direction
3 can be recharged by passing current through it in the opposite direction
4 cannot be recharged.
Karnataka CET 2016
NEET DIGITAL LIBRARY
CHEMISTRY(KCET)

285400 For a cell involving two electron changes,\(E_{\text {cell }}^{\circ}=\) 0.3 V at \(25^{\circ} \mathrm{C}\). The equilibrium constant of the reaction is

1 \(10^{-10}\)
2 \(3 \times 10^{-2}\)
3 10
4 \(10^{10}\)
Karnataka CET 2018
CHEMISTRY(KCET)

285401 By passing electric current,\(\mathrm{NaClO}_3\) is converted into \(\mathrm{NaClO}_4\) according to the following equation:

\(\mathrm{NaClO}_3+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{NaClO}_4+\mathrm{H}_2\)
How many moles of \(\mathrm{NaClO}_4\) will be formed when three faradays of charge is passed through \(\mathrm{NaClO}_3\) ?

1 0.75
2 3.0
3 1.5
4 1.0
Karnataka CET 2017
CHEMISTRY(KCET)

285402 In the electrolysis of aqueous sodium chloride solution, which of the half cell reaction will occur at anode?

1 \(\mathrm{Cl}^{-}(\)aq \() \rightarrow \frac{1}{2} \mathrm{Cl}_2+e^{-}\);
\(E_{\mathrm{cell}}^{\circ}=1.36 \text { volts }\)
2 \(2 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{O}_2+4 \mathrm{H}^{+}+4 \mathrm{e}^{-}\); \(E_{\text {cell }}^{\circ}=1.23\) volts
3 \(\mathrm{Na}^{+}(\)aq \()+e^{-} \rightarrow \mathrm{Na}(\mathrm{s})\);
\(E^{\circ}=-2.71\) volts
4 \(\mathrm{H}^{+}(\)aq \()+e^{-} \rightarrow \frac{1}{2} \mathrm{H}_2\);
\(E_{\text {cell }}^{\circ}=0.00 \text { volts }\)
Karnataka CET 2017
CHEMISTRY(KCET)

285403 Which of the following is incorrect in a galvanic cell?

1 Oxidation occurs at anode.
2 Reduction occurs at cathode.
3 The electrode at which electrons are gained is called cathode.
4 The electrode at which electrons are lost is called cathode.
Karnataka CET 2016
CHEMISTRY(KCET)

285404 A secondary cell is one which

1 can be recharged
2 can be recharged by passing current through it in the same direction
3 can be recharged by passing current through it in the opposite direction
4 cannot be recharged.
Karnataka CET 2016
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CHEMISTRY(KCET)

285400 For a cell involving two electron changes,\(E_{\text {cell }}^{\circ}=\) 0.3 V at \(25^{\circ} \mathrm{C}\). The equilibrium constant of the reaction is

1 \(10^{-10}\)
2 \(3 \times 10^{-2}\)
3 10
4 \(10^{10}\)
Karnataka CET 2018
CHEMISTRY(KCET)

285401 By passing electric current,\(\mathrm{NaClO}_3\) is converted into \(\mathrm{NaClO}_4\) according to the following equation:

\(\mathrm{NaClO}_3+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{NaClO}_4+\mathrm{H}_2\)
How many moles of \(\mathrm{NaClO}_4\) will be formed when three faradays of charge is passed through \(\mathrm{NaClO}_3\) ?

1 0.75
2 3.0
3 1.5
4 1.0
Karnataka CET 2017
CHEMISTRY(KCET)

285402 In the electrolysis of aqueous sodium chloride solution, which of the half cell reaction will occur at anode?

1 \(\mathrm{Cl}^{-}(\)aq \() \rightarrow \frac{1}{2} \mathrm{Cl}_2+e^{-}\);
\(E_{\mathrm{cell}}^{\circ}=1.36 \text { volts }\)
2 \(2 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{O}_2+4 \mathrm{H}^{+}+4 \mathrm{e}^{-}\); \(E_{\text {cell }}^{\circ}=1.23\) volts
3 \(\mathrm{Na}^{+}(\)aq \()+e^{-} \rightarrow \mathrm{Na}(\mathrm{s})\);
\(E^{\circ}=-2.71\) volts
4 \(\mathrm{H}^{+}(\)aq \()+e^{-} \rightarrow \frac{1}{2} \mathrm{H}_2\);
\(E_{\text {cell }}^{\circ}=0.00 \text { volts }\)
Karnataka CET 2017
CHEMISTRY(KCET)

285403 Which of the following is incorrect in a galvanic cell?

1 Oxidation occurs at anode.
2 Reduction occurs at cathode.
3 The electrode at which electrons are gained is called cathode.
4 The electrode at which electrons are lost is called cathode.
Karnataka CET 2016
CHEMISTRY(KCET)

285404 A secondary cell is one which

1 can be recharged
2 can be recharged by passing current through it in the same direction
3 can be recharged by passing current through it in the opposite direction
4 cannot be recharged.
Karnataka CET 2016
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NEET Test Series from KOTA - 10 Papers In MS WORD WhatsApp Here
CHEMISTRY(KCET)

285400 For a cell involving two electron changes,\(E_{\text {cell }}^{\circ}=\) 0.3 V at \(25^{\circ} \mathrm{C}\). The equilibrium constant of the reaction is

1 \(10^{-10}\)
2 \(3 \times 10^{-2}\)
3 10
4 \(10^{10}\)
Karnataka CET 2018
CHEMISTRY(KCET)

285401 By passing electric current,\(\mathrm{NaClO}_3\) is converted into \(\mathrm{NaClO}_4\) according to the following equation:

\(\mathrm{NaClO}_3+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{NaClO}_4+\mathrm{H}_2\)
How many moles of \(\mathrm{NaClO}_4\) will be formed when three faradays of charge is passed through \(\mathrm{NaClO}_3\) ?

1 0.75
2 3.0
3 1.5
4 1.0
Karnataka CET 2017
CHEMISTRY(KCET)

285402 In the electrolysis of aqueous sodium chloride solution, which of the half cell reaction will occur at anode?

1 \(\mathrm{Cl}^{-}(\)aq \() \rightarrow \frac{1}{2} \mathrm{Cl}_2+e^{-}\);
\(E_{\mathrm{cell}}^{\circ}=1.36 \text { volts }\)
2 \(2 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{O}_2+4 \mathrm{H}^{+}+4 \mathrm{e}^{-}\); \(E_{\text {cell }}^{\circ}=1.23\) volts
3 \(\mathrm{Na}^{+}(\)aq \()+e^{-} \rightarrow \mathrm{Na}(\mathrm{s})\);
\(E^{\circ}=-2.71\) volts
4 \(\mathrm{H}^{+}(\)aq \()+e^{-} \rightarrow \frac{1}{2} \mathrm{H}_2\);
\(E_{\text {cell }}^{\circ}=0.00 \text { volts }\)
Karnataka CET 2017
CHEMISTRY(KCET)

285403 Which of the following is incorrect in a galvanic cell?

1 Oxidation occurs at anode.
2 Reduction occurs at cathode.
3 The electrode at which electrons are gained is called cathode.
4 The electrode at which electrons are lost is called cathode.
Karnataka CET 2016
CHEMISTRY(KCET)

285404 A secondary cell is one which

1 can be recharged
2 can be recharged by passing current through it in the same direction
3 can be recharged by passing current through it in the opposite direction
4 cannot be recharged.
Karnataka CET 2016
NEET DIGITAL LIBRARY
CHEMISTRY(KCET)

285400 For a cell involving two electron changes,\(E_{\text {cell }}^{\circ}=\) 0.3 V at \(25^{\circ} \mathrm{C}\). The equilibrium constant of the reaction is

1 \(10^{-10}\)
2 \(3 \times 10^{-2}\)
3 10
4 \(10^{10}\)
Karnataka CET 2018
CHEMISTRY(KCET)

285401 By passing electric current,\(\mathrm{NaClO}_3\) is converted into \(\mathrm{NaClO}_4\) according to the following equation:

\(\mathrm{NaClO}_3+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{NaClO}_4+\mathrm{H}_2\)
How many moles of \(\mathrm{NaClO}_4\) will be formed when three faradays of charge is passed through \(\mathrm{NaClO}_3\) ?

1 0.75
2 3.0
3 1.5
4 1.0
Karnataka CET 2017
CHEMISTRY(KCET)

285402 In the electrolysis of aqueous sodium chloride solution, which of the half cell reaction will occur at anode?

1 \(\mathrm{Cl}^{-}(\)aq \() \rightarrow \frac{1}{2} \mathrm{Cl}_2+e^{-}\);
\(E_{\mathrm{cell}}^{\circ}=1.36 \text { volts }\)
2 \(2 \mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{O}_2+4 \mathrm{H}^{+}+4 \mathrm{e}^{-}\); \(E_{\text {cell }}^{\circ}=1.23\) volts
3 \(\mathrm{Na}^{+}(\)aq \()+e^{-} \rightarrow \mathrm{Na}(\mathrm{s})\);
\(E^{\circ}=-2.71\) volts
4 \(\mathrm{H}^{+}(\)aq \()+e^{-} \rightarrow \frac{1}{2} \mathrm{H}_2\);
\(E_{\text {cell }}^{\circ}=0.00 \text { volts }\)
Karnataka CET 2017
CHEMISTRY(KCET)

285403 Which of the following is incorrect in a galvanic cell?

1 Oxidation occurs at anode.
2 Reduction occurs at cathode.
3 The electrode at which electrons are gained is called cathode.
4 The electrode at which electrons are lost is called cathode.
Karnataka CET 2016
CHEMISTRY(KCET)

285404 A secondary cell is one which

1 can be recharged
2 can be recharged by passing current through it in the same direction
3 can be recharged by passing current through it in the opposite direction
4 cannot be recharged.
Karnataka CET 2016