Voltaic Cells and Their Functions

The video tutorial explains voltaic cells, which convert chemical energy into electrical energy through chemical reactions. It covers various types of voltaic cells, including simple cells, Daniell cells, dry cells, lead acid accumulators, and alkaline cells. The tutorial details the structure and function of these cells, highlighting the role of electrodes, electrolytes, and the electrochemical series. It also discusses the applications of these cells in everyday devices and industries.

What is the primary function of a voltaic cell?

• To convert chemical energy into electrical energy

• To convert electrical energy into chemical energy

• To store mechanical energy

• To produce thermal energy

Which of the following is NOT an example of a voltaic cell?

• Lead acid accumulator

• Simple cell

• Fuel cell

• Daniell cell

In a simple voltaic cell, which metal acts as the negative terminal?

• The metal with higher atomic number

• The metal lower in the electrochemical series

• The metal with lower atomic number

• The metal higher in the electrochemical series

What happens at the negative terminal of a simple voltaic cell?

• Electrons are accepted

• Electrons are released

• Protons are released

• Neutrons are accepted

In a zinc and copper voltaic cell, what is the role of the zinc plate?

• It remains unchanged

• It accepts electrons

• It dissolves to form zinc ions

• It acts as the positive terminal

What is the purpose of a salt bridge in a Daniell cell?

• To allow ions to pass and complete the circuit

• To store electrical energy

• To prevent the flow of electrons

• To separate the electrodes

Which electrolyte is NOT used in a Daniell cell's salt bridge?

• Hydrochloric acid

• Potassium chloride solution

• Sodium nitrate solution

• Dilute sulfuric acid

In a dry cell, what is the role of the carbon rod?

• It acts as the electrolyte

• It acts as the positive terminal

• It acts as the separator

• It acts as the negative terminal

What is the primary use of a lead acid accumulator?

• To power small electronic devices

• As a vehicle battery

• To store solar energy

• To power household appliances

Which type of cell is commonly used in watches and cameras?

• Daniell cell

• Simple cell

• Lead acid accumulator

• Alkaline cell