How does redox reaction convert into electrical energy and chemical energy.

Hint: You must know what electrical and chemical energy is before solving this question. Electrical energy is a form of energy resulting from the flow of electric charge whereas a chemical energy is the energy stored in the bonds of chemical compounds, like atoms and molecules.

Complete answer:
We need to know that it is the ability to do work or apply force to move an object. We can convert redox reactions into electrical energy and chemical energy by transferring electrons externally or can also be supplying electrons in a desired reaction. If we just let reaction happen in a test tube, then electron transfer will happen in the solution. You cannot collect these electrons. But if you separate the reactants with products, by external wire, then to make the reaction happen, electrons will have to move along the wire, then we get electrical energy. That is for a galvanic cell.
In the case of a voltaic cell, we supply electrical energy to change the energy of the electron. These electrons can then move from electrode across electrode-solution interface into solution, for a reduction reaction which means you consume electrical energy and form a new chemical substance, and you convert electrical energy to chemical energy. A chemical energy can be released when bonds are formed or broken.

Note:
When we talk of a battery, a battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit.