Electrochemistry · JEE Main previous year questions

2002 5 questions

1. Q2082002 · 27 Apr 2002 · Shift 1

   For a cell given below $$\underset{-}{\mathrm{Ag}}|\mathrm{A}{\mathrm{g}}^{+}||\mathrm{C}{\mathrm{u}}^{2+}|\underset{+}{\mathrm{Cu}}$$ $\mathrm{A}{\mathrm{g}}^{+}+{\mathrm{e}}^{-}⟶\mathrm{Ag};E^{\circ }=x$ $\mathrm{C}{\mathrm{u}}^{2+}+2{\mathrm{e}}^{-}⟶\mathrm{Cu};E^{\circ }=y$ $E^{\circ }$ cell is :

   1. A.$x+2y$
   2. B.$2x+y$
   3. C.$y-x$
   4. D.$y-2x$
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   Answer: C

2. Q2172002 · 27 Apr 2002 · Shift 1

   Aluminium is extracted by the electrolysis of

   1. A.bauxite
   2. B.alumina
   3. C.alumina mixed with molten cryolite
   4. D.molten cryolite
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   Answer: C