Which are the gasses that get precipitated in the form of bubbles when the battery is overcharged?(a) Hydrogen and helium(b) Nitrogen and hydrogen(c) Hydrogen and oxygen(d) Nitrogen and oxygenI have been asked this question in a national level competition.Question is taken from Battery Charging topic in section Storage Batteries of Automotive Engine Design

Which are the gasses that get precipitated in the form of bubbles when

1.	Which are the gasses that get precipitated in the form of bubbles when the battery is overcharged?(a) Hydrogen and helium(b) Nitrogen and hydrogen(c) Hydrogen and oxygen(d) Nitrogen and oxygenI have been asked this question in a national level competition.Question is taken from Battery Charging topic in section Storage Batteries of Automotive Engine Design
Answer» Correct option is (c) Hydrogen and oxygen For EXPLANATION I would say: The major FACTOR AFFECTING the charging is GASSING wherein excessive hydrogen and oxygen BUBBLES due to overcharging may wash away active material on the plates, decreasing the charging rate. Due to which overcharging must be avoided.

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