Question

Which device converts chemical energy into mechanical energy?
A. Lightning rod.
B. Cell.
C. Light bulb.
D. Switch.

Answer 1

Hint: We need to know about the chemical energy and the mechanical energy to solve this question. During a chemical reaction, the chemical energy can be released, often in the form of heat. Electrical energy is the form of energy that comes from the electrical charge flow.

Complete Step-by-Step solution:
A battery is a device that directly converts chemical energy contained in its active materials into electrical energy through an electrochemical oxidation-reduction ( redox) reaction. This form of reaction involves the transfer of electrons through an electric circuit from one material to another.
While often using the term battery, the cell is the actual electrochemical unit used to generate or store electrical energy If a zinc electrode and copper electrode are put in a diluted sulfuric acid solution, the two metals react to the presence of each other within the electrolyte and create a potential difference of approximately 1 volt between them. The zinc electrode gradually dissolves into the acid electrolyte as a conducting path crosses the electrodes externally, the zinc molecule goes into the electrolyte in the form of positive ions as the electrons are left on the electrode. In contrast, the copper electrode does not dissolve in the electrolyte. Then it surrenders the electrons to the positively charged hydrogen ions in the electrolyte, converting them into hydrogen gas molecules that bubble up. Electrode around. The zinc ion combines with the sulphate ion to form zinc sulphate, and that salt falls to the cell's bottom. The consequence of all this is that the dissolving zinc electrode will be charged negatively, the copper electrode will be left with a positive charge and electrons will travel through the external circuit to the copper electrode from the zinc.
This is how the chemical energy is converted into electrical energy, and the converting device is a cell.
So choice (B) is the correct answer.

Note: Whenever we ask questions of this type we should first have knowledge of the energies mentioned in the question. After that, we must know how they are made, and what their origins are. Then we should be converting that hoe into one form to another. We can also identify the devices that are used for the conversion by knowing all this. So we'll get our answer.