Question

The standard oxidation potentials of Zn and Ag in water at

{25^ \circ }C

are,

\mathrm{Zn}\left( s \right) \to \mathrm{Z}{\mathrm{n}^{2 + }} + 2e;{E^ \circ } = 0.76\mathrm{V}

\mathrm{Ag}\left( s \right) \to \mathrm{A}{\mathrm{g}^ + } + e;{E^ \circ } = - 0.80\mathrm{V}

Which reaction actually takes place?

Accepted Answer

${m{Zn}}\left( s ight) + 2{m{A}}{{m{g}}^ + }\left( {aq} ight) 	o {m{Z}}{{m{n}}^{2 + }}{m{ + Ag}}\left( s ight)$

Answer

${m{Z}}{{m{n}}^{2 + }} + 2{m{A}}{{m{g}}^ + }\left( s ight) 	o 2{m{A}}{{m{g}}^ + }\left( {aq} ight) + {m{Zn}}\left( s ight)$

Answer

${m{Zn}}\left( s ight) + 2{m{Ag}}\left( s ight) 	o {m{Z}}{{m{n}}^{2 + }}\left( {aq} ight) + {m{A}}{{m{g}}^ + }\left( {aq} ight)$

Answer

${m{Z}}{{m{n}}^{2 + }}\left( {aq} ight) + {m{A}}{{m{g}}^ + }\left( {aq} ight) 	o {m{Zn}}\left( s ight) + {m{Ag}}\left( s ight)$

NEET UG CHEMISTRY MCQ: ELECTRO CHEMISTRY

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