To a mixture containing pieces of zinc, copper and silver, 1 M H 2 SO 4 was added. H 2…
Chemistry · JEE Advanced · NTA Exams — Electrochemistry
To a mixture containing pieces of zinc, copper and silver, 1 M H2SO4 was added. H2 gas was found to be evolved. Which of the metal/metals do you think has/have reacted ?
Given \(\mathrm{E}_{\mathrm{Zn}^{\circ} / \mathrm{Zn}^{2+}}^{\circ}=+0.76 \mathrm{~V}, \quad \mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=+0.34 \mathrm{~V},\)
\(\mathrm{E}_{\mathrm{Ag}^{+} / \mathrm{Ag}}^{\mathrm{o}}\) + 0.80 V.
Given \(\mathrm{E}_{\mathrm{Zn}^{\circ} / \mathrm{Zn}^{2+}}^{\circ}=+0.76 \mathrm{~V}, \quad \mathrm{E}_{\mathrm{Cu}^{2+} / \mathrm{Cu}}^{\circ}=+0.34 \mathrm{~V},\)
\(\mathrm{E}_{\mathrm{Ag}^{+} / \mathrm{Ag}}^{\mathrm{o}}\) + 0.80 V.
- All the metals
- Only Zn
- Both Zn and Cu
- Only Ag.
Answer
(B) Only Zn
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