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What do batteries emit while charging?

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in Energy Engineering by (91.0k points)
What do batteries emit while charging?

(a) Nitrogen

(b) Oxygen

(c) Hydrogen

(d) Carbon

The question was asked by my college director while I was bunking the class.

Question is taken from Engine Starting Methods in chapter Diesel Engine Plant of Energy Engineering

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The correct answer is (c) Hydrogen

The explanation is: When charging, the battery will emit hydrogen gas; it is therefore extremely important to keep the flames and sparks away from battery. It is also advisable to wear goggles and gloves while servicing the battery.

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