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  • How long should a current of 6A be passed in order to prepare 10% by mass Cd in Cd-Hg a mol gcm on cathode of 5.6g of Hg.Option: 1</stro

How long should a current of 6A be passed in order to prepare 10% by mass Cd in Cd-Hg a mol gcm on cathode of 5.6g of Hg.

Option: 1

145.64 sec


Option: 2

22.4 sec


Option: 3

172.32 sec
 


Option: 4

21.64 sec


Answers (1)

best_answer

10g Cd should present in 90g of Hg

Mass of Cd required with 5.6g of Hg at Cathode

\frac{10}{90} \times 5.6=0.6 \left\{c d^2+2 e^{-} \rightarrow c d\right\}

\mathrm{ \frac{0.6}{112} \times 2=\frac{6 \times t}{9600} }

\mathrm{ t=172.32 \mathrm{~sec} }

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Rishabh

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