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Which of the following increase due to which the electrode gravity decreases?

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Which of the following increase due to which the electrode gravity decreases?

(a) Enthalpy

(b) Entropy

(c) Temperature

(d) Pressure

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I want to ask this question from Lead-Acid Battery topic in portion Storage Batteries of Automotive Engine Design

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Right option is (c) Temperature

To explain I would say: The electrolyte gravity varies with temperature. It increases with the decrease in temperature and vice versa. The gravity value is always mentioned at a specified standard temperature, which is usually 15-degree centigrade.

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