Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NTA Abhyas NEET2020ChemistryElectrochemistryPractice

Consider the following recuction processes Z n 2 + + 2 e - → Z n ( s ) ; E ° = - 0.76 V C a 2 + + 2 e - → C a ( s ) ; E ° = - 2.87 V M g 2 + + 2 e - → M g ( s ) ; E ° = - 2.36 V N i 2 + + 2 e - → N i ( s ) ; E ° = - 0.25 V The reduction power of the metals increases in the order

Options

  1. ACa < Zn < Mg < Ni
  2. BNi < Zn < Mg < Ca
  3. CZn > Mg < Ni < Ca
  4. DCa < Mg < Zn < Ni

Correct answer

B. Ni < Zn < Mg < Ca

Step-by-step solution

Reducing power ∝ Tendency to undergo oxidation &#x221D; 1 reduction &#x2004; potential &#x2004; values so, reducing power decreases as Ca > Mg > Zn > Ni

Practice Electrochemistry on Quantrex Academy →

More from Electrochemistry

Calculate the conductivity of 0.025 M BaCl ₂ solution if the molar conductivity of salt at 25^ C is 325 ⁻¹ cm ^2 mol ⁻¹ . 2026Calculate the equilibrium constant at 25 ^ C for the cell reaction, Ni(s) + Cu ²⁺(1 M ) Ni ²⁺(1 M ) + Cu(s) if E^ _ cell is 0.592 V . 2026Calculate the time required in second to deposit 5.85 g Ni from NiCl ₂ solution by passing 10 A current (molar mass of Ni = 58.5 g mol ⁻¹ ) 2026Which of the following cell reactions is exhibited by fuel cell? 2026Which of the following types of cells is used for electroplating? 2026Which of the following acts as a cathode in a dry cell? 2026What is the Standard cell potential of a cell constituted by two electrodes, A (E^0_ A ^+/ A = 0.30 V ) and B (E^0_ B ^+/ B = +0.42 V ) ? 2026How long (in minutes) must a 2 A current be passed through AgNO ₃ solution to deposit 5.4 g Ag ? [Molar mass of Ag = 108 g mol ⁻¹ ] 2026 Full Electrochemistry list All NTA Abhyas NEET PYQs