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NEET 2024
Exam
NEET
Year
2024
Subject
Chemistry
Chapter
Electrochemistry

NEET 2024 · Chemistry · Electrochemistry

Mass in grams of copper deposited by passing 9.6487 A current...

Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100 seconds is (Given : Molar mass of Cu:63 g mol−1,1 F=96487C\mathrm{Cu}: 63 \mathrm{~g} \mathrm{~mol}^{-1}, 1 \mathrm{~F}=96487 \mathrm{C} )

Options

  1. A0.315 g
  2. B31.5 g
  3. C0.0315 g
  4. D3.15 g

Correct answer

A. 0.315 g

Step-by-step solution

Cu2+(aq)+2e−→Cu(s)\mathrm{Cu}^{2+}(\mathrm{aq})+2 \mathrm{e}^{-} \rightarrow \mathrm{Cu}(\mathrm{s}) Mass of  Cu deposited (w)=M×i×tnF=63×9.6487×1002×96487=0.315g\begin{aligned} \text{ Mass\text{ of } Cu deposited }(w) & =\frac{M \times i \times t}{n F} \\ & =\frac{63 \times 9.6487 \times 100}{2 \times 96487} \\ & =0.315 \mathrm{ g}\end{aligned}$$
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