Which of the following is incorrect regarding batteries 1

Last updated: 7/4/2023

Which of the following is incorrect regarding batteries 1 Primary batteries cannot be recharged and reused again 2 Lead storage battery is an example of secondary battery 3 In a H O2 fuel cell water is electrolysed to give H and O 4 In a Ni Cd battery the specific gravity of the alkaline electrolyte remains same