Q.

The density of copper is 8 gm/cc. Number of coulombs required to plate an area of 10 cm × 10 cm on both sides to a thickness of 10–2cm using CuSO4solution as electrolyte is

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a

48,250

b

96,500

c

10,000

d

24,125

answer is A.

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Detailed Solution

Copper density =8 g/cm3 Vol. = A×t = 102×10-2 =1 Total Vol. = 2 CC 1CC Vol. = 8gm of Cu weight of copper for 2 CC = 8×2=16gm Cu2++2e-Cu 96500C = 32gm of Cu and for the 16gm =965002=48250

Therefore, the correct option is A

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The density of copper is 8 gm/cc. Number of coulombs required to plate an area of 10 cm × 10 cm on both sides to a thickness of 10–2cm using CuSO4solution as electrolyte is