Electro Test Quiz

Activity coefficients calculated using Debye Huckel law are always

• Greater than zero

• Equal to one

• Less than one

• Less than Zero

Which of the following statement is true about the salt bridge?

• It is an agar agar gel through which ions cannot pass

• The transport number of the cation and anion in the salt bridge is roughly the same in closed circuit

• Anions in the salt bridge always moves towards the anode

• It drives free electrons from one electrode to the other

In a Lithium-ion battery a Solid Electrolyte Interface (SEI) forms between the anode and the electrolyte. The ideal characteristic of an SEI is that it should be

• Electron conducting and Ion insulating

• Both electron and ion conducting

• Both electron and ion insulating

• Electron-insulating and ion-conducting

The definition of an anode is

• The electrode at which oxidation takes place

• The electrode at which reduction takes place

• The electrode towards which anions move

• The electrode away from which the anions move

What is the energy gained by 1 mol of electrons accelerated through a potential of 1 V.

• 1 eV

• 96485 J

• 1 F

• 4.2 kcal

What kind occurs in electrochemistry

• Redox reactions

• Deisplacement reactions

• Decomposition reactions

• Combination reactions

An increase in the equivalent conductance of a strong electrolyte with dilution is primarily due to

• Increased ionic mobility of ions

• Decrease in both ion numbers and ionic mobility

• Increase in both ion numbers and ionic mobility

• 100 percent electrolyte ionisation with natural dilution

Which of the following is always true in regard to the cathode

• Cations move towards the cathode

• Oxidation occurs at the cathode

• Reduction occurs at the cathode

• Cations move away from the cathode

Which of the following is incorrect

• ΔG=-nFE

• E_cell =E_cathode-E_anode

The area under an I-V curve gives

• Power

• Energy

• Charge

• Time