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A metal surface of 100 cm^2 area has to be coated with nickel layer of thickness 0.001 mm. A current of 2A was passed through a solution of Ni(NO3)2 for 'x' seconds to coat the desired layer. The value of x is ________ (Nearest integer) [Ni (density of Nickel) is 10 g mL^-1, Molar mass of Nickel is 60 g mol^-1, F = 96500 C mol^-1]

1. [Ni (density of Nickel) is 10 g mL^-1, Molar mass of Nickel is 60 g mol^-1, F = 96500 C mol^-1]
2. [16]
3. [Ni (density of Nickel) is 10 g mL^-1, Molar mass of Nickel is 60 g mol^-1, F = 96500 C mol^-1]
4. [Ni (density of Nickel) is 10 g mL^-1, Molar mass of Nickel is 60 g mol^-1, F = 96500 C mol^-1]

Correct answer: [16]

Solution

The correct option is 16 seconds because it is calculated based on the amount of nickel needed to achieve the specified thickness, using Faraday's laws of electrolysis, which relate the mass of the substance deposited to the current and time.

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