No, if you have to add fluid to a battery you just add Distilled Water and nothing else. The Electrolyte in a battery is 65% distilled water and 35% sulfuric acid.
Do you have any sulfuric acid on hand? There is enough acid already in the battery. Just add distilled water.
H2 (g) + FeSO4 (s) hydrogen gas and iron sulphate
Nothing.
The acid in automotive batteries is a sulfuric acid/water solution known commercially as "battery acid". There is about 29 t0 32% sulfuric acid in the solution, the rest is water. The purpose of the water is to allow the solution to conduct electricity by chemical conversion in the cell. As the battery is used the water can evaporate or escape raising the concentration o acid. When this happens the efficiency of the battery is reduced. More water must be added to bring the solution back to the proper ratio of acid and water.
Adding sulfuric acid to water is the recommended way of working to avoid accidents.
Sulfuric acid is added to sugar to make carbon
Because the reaction mixture contains a small amount of sulfuric acid, the sodium bicarbonate will neutralize the solution and in the process, will produce CO2.
hydrogen gas evolved
No.
Benzocaine is formed
It depends on what has been added or how dilute it is.
The color is orange to red.