For lead storage battery pick the correct statements:
A. During charging of battery, PbSO4 on anode is converted into PbO2
B. During charging of battery, PbSO4 on cathode is converted into PbO2
C. lead storage battery consists of grid of lead packed with PbO2 as anode
D. lead storage battery - 38% solution of sulphuric acid as an electrolyte
choose the correct answer from the options given below:
Statement A: "During charging of the battery, PbSO₄ on the anode is converted into PbO₂. Analysis: This statement is incorrect. During the charging process, lead sulfate (PbSO₄) at the anode is converted into lead (Pb) and not lead dioxide (PbO₂). Therefore, this statement is false.
Statement B: "During charging of the battery, PbSO₄ on the cathode is converted into PbO₂. Analysis: This statement is also incorrect. During charging, the lead sulfate (PbSO₄) at the cathode is converted into lead dioxide (PbO₂). Therefore, this statement is true.
Statement C: "Lead storage battery consists of a grid of lead packed with PbO₂ as anode. Analysis: This statement is incorrect. In a lead storage battery, the anode is made of lead (Pb), while the cathode is made of lead dioxide (PbO₂). Therefore, this statement is false.
Statement D: "Lead storage battery has a 38% solution of sulfuric acid as an electrolyte. Analysis: This statement is correct. A lead storage battery uses a 35-38% solution of sulfuric acid (H₂SO₄) as the electrolyte. Therefore, this statement is true.
An electrochemical cell is a device that is used to create electrical energy through the chemical reactions which are involved in it. The electrical energy supplied to electrochemical cells is used to smooth the chemical reactions. In the electrochemical cell, the involved devices have the ability to convert the chemical energy to electrical energy or vice-versa.
Classification of Electrochemical Cell:
Cathode
Denoted by a positive sign since electrons are consumed here
A reduction reaction occurs in the cathode of an electrochemical cell
Electrons move into the cathode
Anode
Denoted by a negative sign since electrons are liberated here
An oxidation reaction occurs here
Electrons move out of the anode
Types of Electrochemical Cells:
Galvanic cells (also known as Voltaic cells)
Chemical energy is transformed into electrical energy.
The redox reactions are spontaneous in nature.
The anode is negatively charged and the cathode is positively charged.
The electrons originate from the species that undergo oxidation.
Electrolytic cells
Electrical energy is transformed into chemical energy.
The redox reactions are non-spontaneous.
These cells are positively charged anode and negatively charged cathode.
