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AIIMS 2003
Exam
AIIMS
Year
2003
Subject
Chemistry
Chapter
Electrochemistry

AIIMS 2003 · Chemistry · Electrochemistry

Time required to deposit one millimole of aluminium metal by the...

Time required to deposit one millimole of aluminium metal by the passage of 9.65 amperes through aqueous solution of aluminium ion is

Options

  1. A30 s30 \mathrm{~s}
  2. B10 s10 \mathrm{~s}
  3. C30,000 s30,000 \mathrm{~s}
  4. D10,000 s10,000 \mathrm{~s}.

Correct answer

B. 10 s10 \mathrm{~s}

Step-by-step solution

Al3++3e−→Al\mathrm{Al}^{3+}+3 e^{-} \rightarrow \mathrm{Al} For deposition of 1 g1 \mathrm{~g} equivalent ≡96500C\equiv 96500 \mathrm{C} For deposition of 1 millimole ≡96.500C\equiv 96.500 \mathrm{C} As Q=It⇒t=QI=96.59.65=10 sQ=I t \Rightarrow t=\frac{Q}{I}=\frac{96.5}{9.65}=10 \mathrm{~s}
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