If an uncharged metal plate is in contact with negatively charged sphere, metal plate becomes

For the generation of electrical potential of 1.1 V, the ideal concentration of zinc and copper ion (in mol dm-3) under standard conditions in the Galvanic cell is

<math xmlns="http://www.w3.org/1998/Math/MathML"><msubsup><mi mathvariant="normal">E</mi><mi>cell</mi><mi mathvariant="normal">o</mi></msubsup><mo>&nbsp;</mo></math>of the reaction is&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>Zn</mi><mo>(</mo><mi mathvariant="normal">s</mi><mo>)</mo><mo>+</mo><msup><mi>Cu</mi><mrow><mn>2</mn><mo>+</mo></mrow></msup><mo>(</mo><mi>aq</mi><mo>)</mo><mo>→</mo><msup><mi>Zn</mi><mrow><mn>2</mn><mo>+</mo></mrow></msup><mfenced><mi>aq</mi></mfenced><mo>+</mo><mi>Cu</mi><mo>(</mo><mi mathvariant="normal">s</mi><mo>)</mo><mo>;</mo></math> <math xmlns="http://www.w3.org/1998/Math/MathML"><mfenced close="]" open="["><mrow><mi>If</mi><mo>&nbsp;</mo><msubsup><mi mathvariant="normal">E</mi><mrow><msup><mi>Zn</mi><mrow><mn>2</mn><mo>+</mo></mrow></msup><mo>/</mo><mi>Zn</mi></mrow><mi mathvariant="normal">o</mi></msubsup><mo>=</mo><mo>-</mo><mn>0</mn><mo>.</mo><mn>76</mn><mo>,</mo><msubsup><mi mathvariant="normal">E</mi><mrow><msup><mi>Cu</mi><mrow><mn>2</mn><mo>+</mo></mrow></msup><mo>/</mo><mi>Cu</mi></mrow><mi mathvariant="normal">o</mi></msubsup><mo>=</mo><mn>0</mn><mo>.</mo><mn>34</mn><mi mathvariant="normal">V</mi></mrow></mfenced></math>

For the cell,&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>Cu</mi><mfenced separators="|" close="|" open="|"><mrow><msup><mi>Cu</mi><mrow><mn>2</mn><mo>+</mo></mrow></msup><mo>∥</mo><msup><mi>Ag</mi><mo>+</mo></msup></mrow></mfenced><mi>Ag</mi><mo>,</mo><msubsup><mi mathvariant="normal">E</mi><mtext>cell&nbsp;</mtext><mo>∘</mo></msubsup><mo>=</mo><mo>+</mo><mn>0</mn><mo>.46</mo><mi mathvariant="normal">V</mi></math>&nbsp;If concentration of Cu2+ ions is doubled, then&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msubsup><mi mathvariant="normal">E</mi><mi>cell</mi><mi mathvariant="normal">o</mi></msubsup></math>&nbsp;will be

The &nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>E</mi><mi>O</mi></msup><mtext>&nbsp;for&nbsp;</mtext><mi>C</mi><msub><mi>l</mi><mn>2</mn></msub><mo>/</mo><mi>C</mi><msup><mi>l</mi><mo>−</mo></msup></math>&nbsp; is &nbsp;&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>+</mo><mn>1.36</mn></math>&nbsp; for I2 /&nbsp;<math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">I</mi><mo>-</mo></msup></math>&nbsp;is &nbsp;&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>+</mo><mn>0.53</mn></math>&nbsp; for&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>Ag</mi><mo>+</mo></msup><mo>/</mo><mi>Ag</mi><mtext>&nbsp;is&nbsp;</mtext><mo>+</mo><mn>0.79</mn><msup><mi>Na</mi><mo>+</mo></msup><mo>/</mo><mi>Na</mi></math>&nbsp; &nbsp; is<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>-</mo><mn>2</mn><mo>.</mo><mn>71</mn></math>&nbsp; and for&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi>Li</mi><mo>+</mo></msup><mo>/</mo><mi>Li</mi></math>&nbsp; &nbsp;is &nbsp;&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>-</mo><mn>3</mn><mo>.</mo><mn>04</mn></math>&nbsp; Arrange the following ionic species in decreasing order of reducing strength.&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">I</mi><mrow><mo>−</mo><mo>&nbsp;</mo></mrow></msup><mi>Ag</mi><mo>,</mo><msup><mi>Cl</mi><mo>−</mo></msup><mo>,</mo><mi>Li</mi><mo>,</mo><mi>Na</mi></math>

Deduce from the following&nbsp;<math xmlns="http://www.w3.org/1998/Math/MathML"><msup><mi mathvariant="normal">E</mi><mo>⊝</mo></msup></math>values&nbsp;of half cells, what combination of two half cells would results in a cell with&nbsp;the largest potential ?<math xmlns="http://www.w3.org/1998/Math/MathML"><mi mathvariant="normal">I</mi><mo>.</mo><mo>&nbsp;</mo><mi mathvariant="normal">A</mi><mo>+</mo><msup><mi mathvariant="normal">e</mi><mo>-</mo></msup><mo>→</mo><msup><mi mathvariant="normal">A</mi><mo>⊝</mo></msup><mo>,</mo><mo>&nbsp;</mo><msup><mi mathvariant="normal">E</mi><mo>⊝</mo></msup><mo>=</mo><mo>-</mo><mn>0</mn><mo>.</mo><mn>24</mn><mo>&nbsp;</mo><mi mathvariant="normal">V</mi><mspace linebreak="newline">&nbsp;</mspace><mi>II</mi><mo>.</mo><mo>&nbsp;</mo><msup><mi mathvariant="normal">B</mi><mo>⊝</mo></msup><mo>+</mo><msup><mi mathvariant="normal">e</mi><mo>-</mo></msup><mo>→</mo><msup><mi mathvariant="normal">B</mi><mrow><mn>2</mn><mo>-</mo></mrow></msup><mo>,</mo><mo>&nbsp;</mo><msup><mi mathvariant="normal">E</mi><mo>⊝</mo></msup><mo>=</mo><mo>+</mo><mn>1</mn><mo>.</mo><mn>25</mn><mi mathvariant="normal">V</mi><mspace linebreak="newline">&nbsp;</mspace><mi>III</mi><mo>.</mo><mo>&nbsp;</mo><msup><mi mathvariant="normal">C</mi><mo>⊝</mo></msup><mo>+</mo><mn>2</mn><msup><mi mathvariant="normal">e</mi><mo>-</mo></msup><mo>→</mo><msup><mi mathvariant="normal">C</mi><mrow><mn>3</mn><mo>-</mo></mrow></msup><mo>;</mo><mo>&nbsp;</mo><msup><mi mathvariant="normal">E</mi><mo>⊝</mo></msup><mo>=</mo><mo>−</mo><mn>1</mn><mo>.</mo><mn>25</mn><mi mathvariant="normal">V</mi><mspace linebreak="newline">&nbsp;</mspace><mi>IV</mi><mo>.</mo><mo>&nbsp;</mo><mi mathvariant="normal">A</mi><mo>+</mo><mn>2</mn><msup><mi mathvariant="normal">e</mi><mo>-</mo></msup><mo>→</mo><msup><mi mathvariant="normal">D</mi><mrow><mn>2</mn><mo>-</mo></mrow></msup><mo>&nbsp;</mo><mo>&nbsp;</mo><mo>;</mo><msup><mi mathvariant="normal">E</mi><mo>⊝</mo></msup><mo>=</mo><mo>+</mo><mn>0</mn><mo>.</mo><mn>68</mn><mi mathvariant="normal">V</mi></math>

If an uncharged metal plate is in contact with negatively charged sphere, metal plate becomes

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