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A zinc electrowinning cell is being operated at a current of 400 A, voltage of 3.5V, and a cathodic current efficiency of 90%, the specific energy consumption (in kg KJ-1 zinc) is _____. (answer up to two decimal places) Given Atomic ...Read more

A zinc electrowinning cell is being operated at a current of 400 A, voltage of 3.5V, and a cathodic current efficiency of 90%, the specific energy consumption (in kg KJ^{-1} zinc) is _____. (answer up to two decimal places)

Given Atomic weight of zinc =65

Read lessThe sieve analysis of ground quartz particles is given in the table below: The cumulative mass fraction of ...Read more

The sieve analysis of ground quartz particles is given in the table below:

The cumulative mass fraction of particles of size less than 1.68mm is ________. (answer up to two decimal places)

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What is the voltage required to electrolytically refine impure copper of activity 𝑎𝐶𝑢 = 0.9 (Raoultian standard state) to pure copper at 300 K? Given: Gas constant R = 8.314 J mol– 1 K– 1, and Faraday’s constant F = ...Read more

What is the voltage required to electrolytically refine impure copper of activity 𝑎_{𝐶𝑢} = 0.9 (Raoultian standard state) to pure copper at 300 K?

Given: Gas constant R = 8.314 J mol^{–} ^{1} K^{–} ^{1}, and Faraday’s constant F = 96500 C mol ^{-1}.

(A) 1.36 mV (B) 2.72 mV (C) 0 mV (D) 5.44 mV

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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 ...Read more

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.