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AIIMS 2001
Exam
AIIMS
Year
2001
Subject
Chemistry
Chapter
Electrochemistry

AIIMS 2001 · Chemistry · Electrochemistry

How many electrons are delivered at the cathode during electrolysis...

How many electrons are delivered at the cathode during electrolysis by a current of 1 A1 \mathrm{~A} in 60 seconds?

Options

  1. A3.74×10203.74 \times 10^{20}
  2. B6.0×10236.0 \times 10^{23}
  3. C7.48×10217.48 \times 10^{21}
  4. D6.0×10206.0 \times 10^{20}

Correct answer

A. 3.74×10203.74 \times 10^{20}

Step-by-step solution

Charge = current ×\timestime Charge, Q=1 A×60sec=60Q=1 \mathrm{~A} \times 60 \mathrm{sec}=60 coulumb Now, 96500 C charge is carried by 6.023×10236.023 \times 10^{23} electron ⇒60C charge =6.023×102396500×60 electrons =3.74×1020 electrons \begin{aligned} \Rightarrow60 \mathrm{C} \text{ charge }& =\frac{6.023 \times 10^{23}}{96500} \times60 \text{ electrons }\\ & =3.74 \times10^{20} \text{ electrons } \end{aligned}
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