100 Metric tons of copper concentrate containing 21 wt.% Cu is to be processed in 6 months with 25 working days per month and 8 working hours per day. The concentrate is leached by sulphuric acid and electrolyzed in 10 cells arranged in series. The minimum current rating (**Ampere per month per cell**, rounded off to the nearest integer) is ______.**Given: **Faraday constant = 96500 𝐶𝑜𝑢𝑙𝑜𝑚𝑏 𝑝𝑒𝑟 𝑔𝑟𝑎𝑚 𝑒𝑞𝑢𝑖𝑣𝑎𝑙𝑒𝑛𝑡. Atomic weight of copper is 63.

# GATE 2019 Q40

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Correct answer is in the range of 1485-1495 A. Mass of Cu concentrate - 21000g. As per Faraday's law= 21000/6= 3500 kg/month W=Zit ; 3500× 103= 63×i×t/2×96500 Time required to concentrate 21000g per month= 25×8×3600= 720000 sec i= 14891 Minimum current required= 14891/10= 1489.1 A.

Correct answer is in the range of 1485-1495 A.

Mass of Cu concentrate – 21000g.

As per Faraday’s law= 21000/6= 3500 kg/month

W=Zit ; 3500× 10

^{3}= 63×i×t/2×96500Time required to concentrate 21000g per month= 25×8×3600= 720000 sec

i= 14891

Minimum current required= 14891/10= 1489.1 A.

Why 103 is multiplied with 3500?

Why 103 is multiplied with 3500?

See lesshave you find the trick bro?

have you find the trick bro?