Electrochemistry Practice Quiz - 1 - Class 9 MCQ

Fundamental difference between an electrolytic cell and the galvanic cell is that in an electrolytic cell free energy

Standard electrode potential are measured with the concentrations of all the species involved in a half-cell is  

Standard hydrogen electrode operated under standard conditions of 1 atm H₂ pressure, 25°C, and pH = 0 has a cell potential of

For a general electrochemical reaction of the type : 

Nernst equation can be written as:  

Relationship between equilibrium constant of the reaction and standard potential of the cell in which that reaction takes place is 

The reversible work done by a galvanic cell is equal to decrease in its Gibbs energy and therefore, if the emf of the cell is E and nF is the amount of charge passed and Δ_rG is the Gibbs energy of the reaction, then

Molar conductivity denoted by the symbol Λm is related to the conductivity of the solution by the equation (K is the conductivity and c the concentration)

Difference between ionic (electrolytic) and electronic conductivity is that electronic conductance takes place in metals by ________ conductance takes place in solutions by ions

When measuring conductivity with a conductivity cell, cell constant denoted by the symbol G* is given by (electrode area of cross section equal to ‘A’ and separated by distance ‘l’)

Conductivity always decreases with decrease in concentration both, for weak and strong electrolytes because of the fact that

Kohlrausch law of independent migration of ions states

According to Faraday’s First Law of ElectrolysisThe amount of chemical reaction which occurs at any electrode during electrolysis by a current is proportional to the

How much charge is required for the reduction of 1 mol of Cu²⁺ to Cu?

How much electricity in terms of Faraday is required to produce 20.0 g of Ca from molten CaCl₂?

How much electricity is required in coulomb for the oxidation of 1 mol of H₂O to O₂?

A solution of Ni(NO₃)₂  is electrolyzed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode? 

Hydrogen gas is not liberated when the following metal is added to dil. HCl.?

The hydrogen electrode is dipped in a solution of pH 3 at 25°C. The potential would be (the value of 2.303 RT/F is 0.059 V) 

In the electrolysis of acidulated water, it is desired to obtain 1.12 cc of hydrogen per second under S.T.P. conditions. The current to be passed is

The one which decreases with dilution is

The standard electrode potential for the half cell reactions are:

The e.m.f. of the cell reaction Fe⁺⁺ + Zn → Zn⁺⁺ + Fe is

Al₂O₃ is reduced by electrolysis at low potentials and high currents. If 4.0 × 104 amperes of current is passed through molten Al₂O₃ for 6 hours, what mass of aluminium is produced? (Assume 100% current efficiency, atomic mass Al = 27 g/mol)