Electrochemistry-2

______is a measure of tendency of a metal to lose or gain electrons, when it is in contact with a solution containing its own ions.

• Reference electrode

• Electrode Potential

• Voltage

The calomel electrode potential depends on the concentration of the ____ ions

• Hg2Cl2

• Chloride

• Hg

Electrolyte concentration cell is a galvanic cell in which electrode and electrolyte present in both half cells are _____ but the concentration of electrolyte is _____.

• Same, different

• different, same

____maintains the desired ionic conductivity and prevent internal short circuiting in the battery

• Electrolyte

• Anode

• Cathode

• Separator

Which of the following is formed at the cathode electrode during the discharging process of a Ni-MH battery?

• Nickel oxy hydroxide

• Nickel hydroxide

• Lithium hydroxide

• Metal hydride

Electrolyte used in the Li-ion battery is

• Lithium Hexafluorophospahte

• KOH

• LiCoO₂

• Ethylene carbonate

In an electrochemical cell

• Potential energy converted to kinetic energy

• Potential energy converted into electrical energy

• electrical energy converted to kinetic energy

• Chemical energy converted into electrical energy

Choose the correct cell representation of Li-ion Battery

• Li | Li⁺, C |LiPF₆ in ethylene carbonate | Li-MO₂                     

• Li+ | Li ,C |LiPF₆ in ethylene carbonate | Li-MO₂                  

•        Li | Li⁺, C |LiPF₆ in ethylene carbonate

The storage battery generally used in electric power station is

• Nickel-cadmium battery

   

• Zinc carbon battery

• Lead-acid battery

• None of the above

Cells are connected in series in order to

• Increase the voltage rating

   

• Increase the current rating

• Increase the life of the cells

• Increase the life of the cells