Question

Who among the following scientist made the statement “Chemical change can produce electricity”?
A. Galvani
B. Faraday
C. Coulomb
D. Thomson

Answer 1

Hint: Galvanic cell is an electrochemical cell that makes use of chemical reactions to generate electrical energy. During chemical reactions there is the exchange of electrons, i.e. there is a flow of charge and as per the definition of electricity, it is the rate of flow of charge.

Complete answer:A chemical reaction that involves oxidation and reduction simultaneously is called the redox reaction. In redox reactions, there is the transfer of electrons is moved from one chemical to another chemical.

The oxidation and reduction occur in two separate containers containing the chemicals which shows spontaneity for the oxidation and reduction respectively. As we know that there is the flow of electrons from one chemical to another during a redox reaction, so to channel the flow of the electron the two containers are connected by an electrical wire.
When the electrons flow into the electrical wire it constitutes the electric current which can be used as electrical energy and hence the chemical energy is transformed into electrical energy.

This was the basic idea behind the statement “chemical change can produce electricity” and the statement was given by Luigi Galvani. The electrochemical cell which makes use of chemical change, i.e. chemical change to produce electricity is called a Galvani cell in his name.
An electrochemical cell that converts the chemical energy of spontaneous redox reactions into electrical energy is known as a galvanic cell. Therefore,

the correct option is (A).

Note: Faraday’s explained the chemical change taking place when the electric current is passed through the chemical. So, in Faraday’s law electricity is the input and the chemical change is the output. But in the Galvani statement, the chemical change is the input and the electricity is the output.