Redox Reactions and Electrode Processes
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CHXI08:REDOX REACTIONS

315408 Standard reduction potentials of the half reactions are given below
\({{\rm{F}}_{\rm{2}}}({\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{F}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 2}}.{\rm{85}}\;{\rm{V}}\)
\({\rm{C}}{{\rm{l}}_{\rm{2}}}(\;{\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2C}}{{\rm{l}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{36}}\;{\rm{V}}\)
\({\rm{B}}{{\rm{r}}_{\rm{2}}}({\rm{l}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2B}}{{\rm{r}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{06}}\;{\rm{V}}\)
\({{\rm{I}}_{\rm{2}}}({\rm{s}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{I}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 0}}.{\rm{53}}\;{\rm{V}}\)
The strongest oxidising and reducing agents respectively are:

1 \({{\rm{F}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}^{\rm{ - }}}\)
2 \({\rm{B}}{{\rm{r}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{l}}^{\rm{ - }}}\)
3 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{B}}{{\rm{r}}^{\rm{ - }}}\)
4 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}_{\rm{2}}}\)
CHXI08:REDOX REACTIONS

315409 Assertion :
If a copper wire is immersed in a solution of \(\mathrm{AgNO}_{3}\), the colour of the solution becomes blue.
Reason :
Copper splits up into atomic form and dissolves.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI08:REDOX REACTIONS

315410 If a spoon of copper metal is placed in a solution of ferrous sulphate

1 No reaction will take place
2 \(\mathrm{\mathrm{Cu}}\) and \(\mathrm{\mathrm{Fe}}\) will precipitate
3 Iron will precipitate
4 Cu will precipitate out
CHXI08:REDOX REACTIONS

315411 Given, \(\mathrm{E_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{o}=-0.74 \mathrm{~V} ; E_{\mathrm{MnO}_{4}^{-} / \mathrm{Mn}}^{o}=1.51 \mathrm{~V}}\)
\({\rm{E}}_{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{ - }}^{{\rm{2 - }}}{\rm{/C}}{{\rm{r}}^{{\rm{3 + }}}}}^{\rm{o}}{\rm{ = 1}}.{\rm{33}}\;{\rm{V}};{\rm{E}}_{{\rm{Cl/C}}{{\rm{l}}^{\rm{ - }}}}^{\rm{o}}{\rm{ = 1}}.{\rm{36}}\;{\rm{V}}\)
Based on the data given above, strongest oxidizing agent will be

1 \(\mathrm{\mathrm{MnO}_{4}^{-}}\)
2 \(\mathrm{\mathrm{Cl}}\)
3 \(\mathrm{\mathrm{Cr}^{3+}}\)
4 \(\mathrm{\mathrm{Mn}^{2+}}\)
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CHXI08:REDOX REACTIONS

315408 Standard reduction potentials of the half reactions are given below
\({{\rm{F}}_{\rm{2}}}({\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{F}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 2}}.{\rm{85}}\;{\rm{V}}\)
\({\rm{C}}{{\rm{l}}_{\rm{2}}}(\;{\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2C}}{{\rm{l}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{36}}\;{\rm{V}}\)
\({\rm{B}}{{\rm{r}}_{\rm{2}}}({\rm{l}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2B}}{{\rm{r}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{06}}\;{\rm{V}}\)
\({{\rm{I}}_{\rm{2}}}({\rm{s}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{I}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 0}}.{\rm{53}}\;{\rm{V}}\)
The strongest oxidising and reducing agents respectively are:

1 \({{\rm{F}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}^{\rm{ - }}}\)
2 \({\rm{B}}{{\rm{r}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{l}}^{\rm{ - }}}\)
3 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{B}}{{\rm{r}}^{\rm{ - }}}\)
4 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}_{\rm{2}}}\)
CHXI08:REDOX REACTIONS

315409 Assertion :
If a copper wire is immersed in a solution of \(\mathrm{AgNO}_{3}\), the colour of the solution becomes blue.
Reason :
Copper splits up into atomic form and dissolves.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI08:REDOX REACTIONS

315410 If a spoon of copper metal is placed in a solution of ferrous sulphate

1 No reaction will take place
2 \(\mathrm{\mathrm{Cu}}\) and \(\mathrm{\mathrm{Fe}}\) will precipitate
3 Iron will precipitate
4 Cu will precipitate out
CHXI08:REDOX REACTIONS

315411 Given, \(\mathrm{E_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{o}=-0.74 \mathrm{~V} ; E_{\mathrm{MnO}_{4}^{-} / \mathrm{Mn}}^{o}=1.51 \mathrm{~V}}\)
\({\rm{E}}_{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{ - }}^{{\rm{2 - }}}{\rm{/C}}{{\rm{r}}^{{\rm{3 + }}}}}^{\rm{o}}{\rm{ = 1}}.{\rm{33}}\;{\rm{V}};{\rm{E}}_{{\rm{Cl/C}}{{\rm{l}}^{\rm{ - }}}}^{\rm{o}}{\rm{ = 1}}.{\rm{36}}\;{\rm{V}}\)
Based on the data given above, strongest oxidizing agent will be

1 \(\mathrm{\mathrm{MnO}_{4}^{-}}\)
2 \(\mathrm{\mathrm{Cl}}\)
3 \(\mathrm{\mathrm{Cr}^{3+}}\)
4 \(\mathrm{\mathrm{Mn}^{2+}}\)
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CHXI08:REDOX REACTIONS

315408 Standard reduction potentials of the half reactions are given below
\({{\rm{F}}_{\rm{2}}}({\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{F}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 2}}.{\rm{85}}\;{\rm{V}}\)
\({\rm{C}}{{\rm{l}}_{\rm{2}}}(\;{\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2C}}{{\rm{l}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{36}}\;{\rm{V}}\)
\({\rm{B}}{{\rm{r}}_{\rm{2}}}({\rm{l}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2B}}{{\rm{r}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{06}}\;{\rm{V}}\)
\({{\rm{I}}_{\rm{2}}}({\rm{s}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{I}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 0}}.{\rm{53}}\;{\rm{V}}\)
The strongest oxidising and reducing agents respectively are:

1 \({{\rm{F}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}^{\rm{ - }}}\)
2 \({\rm{B}}{{\rm{r}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{l}}^{\rm{ - }}}\)
3 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{B}}{{\rm{r}}^{\rm{ - }}}\)
4 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}_{\rm{2}}}\)
CHXI08:REDOX REACTIONS

315409 Assertion :
If a copper wire is immersed in a solution of \(\mathrm{AgNO}_{3}\), the colour of the solution becomes blue.
Reason :
Copper splits up into atomic form and dissolves.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI08:REDOX REACTIONS

315410 If a spoon of copper metal is placed in a solution of ferrous sulphate

1 No reaction will take place
2 \(\mathrm{\mathrm{Cu}}\) and \(\mathrm{\mathrm{Fe}}\) will precipitate
3 Iron will precipitate
4 Cu will precipitate out
CHXI08:REDOX REACTIONS

315411 Given, \(\mathrm{E_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{o}=-0.74 \mathrm{~V} ; E_{\mathrm{MnO}_{4}^{-} / \mathrm{Mn}}^{o}=1.51 \mathrm{~V}}\)
\({\rm{E}}_{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{ - }}^{{\rm{2 - }}}{\rm{/C}}{{\rm{r}}^{{\rm{3 + }}}}}^{\rm{o}}{\rm{ = 1}}.{\rm{33}}\;{\rm{V}};{\rm{E}}_{{\rm{Cl/C}}{{\rm{l}}^{\rm{ - }}}}^{\rm{o}}{\rm{ = 1}}.{\rm{36}}\;{\rm{V}}\)
Based on the data given above, strongest oxidizing agent will be

1 \(\mathrm{\mathrm{MnO}_{4}^{-}}\)
2 \(\mathrm{\mathrm{Cl}}\)
3 \(\mathrm{\mathrm{Cr}^{3+}}\)
4 \(\mathrm{\mathrm{Mn}^{2+}}\)
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CHXI08:REDOX REACTIONS

315408 Standard reduction potentials of the half reactions are given below
\({{\rm{F}}_{\rm{2}}}({\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{F}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 2}}.{\rm{85}}\;{\rm{V}}\)
\({\rm{C}}{{\rm{l}}_{\rm{2}}}(\;{\rm{g}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2C}}{{\rm{l}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{36}}\;{\rm{V}}\)
\({\rm{B}}{{\rm{r}}_{\rm{2}}}({\rm{l}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2B}}{{\rm{r}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 1}}.{\rm{06}}\;{\rm{V}}\)
\({{\rm{I}}_{\rm{2}}}({\rm{s}}){\rm{ + 2}}{{\rm{e}}^{\rm{ - }}} \to {\rm{2}}{{\rm{I}}^{\rm{ - }}}({\rm{aq}});{\rm{E}}^\circ {\rm{ = + 0}}.{\rm{53}}\;{\rm{V}}\)
The strongest oxidising and reducing agents respectively are:

1 \({{\rm{F}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}^{\rm{ - }}}\)
2 \({\rm{B}}{{\rm{r}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{C}}{{\rm{l}}^{\rm{ - }}}\)
3 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{\rm{B}}{{\rm{r}}^{\rm{ - }}}\)
4 \({\rm{C}}{{\rm{l}}_{\rm{2}}}\,\,{\rm{and}}\,\,{{\rm{I}}_{\rm{2}}}\)
CHXI08:REDOX REACTIONS

315409 Assertion :
If a copper wire is immersed in a solution of \(\mathrm{AgNO}_{3}\), the colour of the solution becomes blue.
Reason :
Copper splits up into atomic form and dissolves.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI08:REDOX REACTIONS

315410 If a spoon of copper metal is placed in a solution of ferrous sulphate

1 No reaction will take place
2 \(\mathrm{\mathrm{Cu}}\) and \(\mathrm{\mathrm{Fe}}\) will precipitate
3 Iron will precipitate
4 Cu will precipitate out
CHXI08:REDOX REACTIONS

315411 Given, \(\mathrm{E_{\mathrm{Cr}^{3+} / \mathrm{Cr}}^{o}=-0.74 \mathrm{~V} ; E_{\mathrm{MnO}_{4}^{-} / \mathrm{Mn}}^{o}=1.51 \mathrm{~V}}\)
\({\rm{E}}_{{\rm{C}}{{\rm{r}}_{\rm{2}}}{\rm{O}}_{\rm{ - }}^{{\rm{2 - }}}{\rm{/C}}{{\rm{r}}^{{\rm{3 + }}}}}^{\rm{o}}{\rm{ = 1}}.{\rm{33}}\;{\rm{V}};{\rm{E}}_{{\rm{Cl/C}}{{\rm{l}}^{\rm{ - }}}}^{\rm{o}}{\rm{ = 1}}.{\rm{36}}\;{\rm{V}}\)
Based on the data given above, strongest oxidizing agent will be

1 \(\mathrm{\mathrm{MnO}_{4}^{-}}\)
2 \(\mathrm{\mathrm{Cl}}\)
3 \(\mathrm{\mathrm{Cr}^{3+}}\)
4 \(\mathrm{\mathrm{Mn}^{2+}}\)