Faraday's laws of electrolysis will fail when

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(D) Faraday's laws of electrolysis are fundamental principles that relate the amount of substance deposited or liberated at electrodes to the quantity

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In none of these cases

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(D) Faraday's laws of electrolysis are fundamental principles that relate the amount of substance deposited or liberated at electrodes to the quantity of electricity passed through the electrolyte. These laws are universal and hold true under all the conditions mentioned: $1$. Increasing the temperature affects the rate of reaction and conductivity but does not invalidate the laws. $2$. Inert electrodes do not participate in the chemical reaction,which is consistent with the assumptions of the laws. $3$. $A$ mixture of electrolytes simply involves competing reactions at the electrodes,which can be calculated using the laws based on discharge potentials. Therefore,Faraday's laws do not fail in any of these cases.

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