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BITSAT 2009
Exam
BITSAT
Year
2009
Subject
Chemistry
Chapter
Electrochemistry

BITSAT 2009 · Chemistry · Electrochemistry

When the sample of copper with zinc impurity is to be purified by...

When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are When the sample of copper with zinc impurity is to be purified by electrolysis, the appropriate electrodes are

Options

  1. A(a)
  2. B(b)
  3. C(c)
  4. D(d)

Correct answer

B. (b)

Step-by-step solution

In electrolytic purification cathode is of pure metal and anode is of impure metal. At anode: M→Mn++ne‾\mathrm{M} \rightarrow \mathrm{M}^{\mathrm{n}+}+\mathrm{n} \overline{\mathrm{e}} At cathode: Mn++ne‾→M\mathrm{M}^{\mathrm{n}+}+\mathrm{n} \overline{\mathrm{e}} \rightarrow \mathrm{M}. The pure metal is thus deposited at cathode.
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