AP EAMCET201824 Apr 2018Morning ShiftChemistryElectrochemistryActual
Assertion (A): The charge on one mole of electrons is one Faraday. Reason (R): The quantity of current required to deposit one mole of Mg from Mg ²⁺ electrolyte solution is two Faradays. The correct answer is
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A).
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A).
- C(A) is correct but (R) is not correct.
- D(A) is not correct but (R) is correct.
Correct answer
A. Both (A) and (R) are correct and (R) is the correct explanation of (A).
Step-by-step solution
The quantity of current required to deposit one mole of Mg from Mg ²⁺ electrolyte solution is two Faradays. Mg ²⁺+2 e⁻ Mg Quantity of electricity required =2 ~F Thus, two mole of electrons produce one mole of Mg . It can be concluded that if n, c=1 ~mol electrons are involved in the electrod reaction, the passage of n Faradays of electricity will liberate one mole of the substance, i.e. the charge on one mole of electrons is one Faraday.