Chemistry
The acid used in lead storage cells is

Hydrochloric acid
Phosphoric acid
Nitric acid
Sulphuric acid

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Chemistry
Table salt gets moist during rainy season because

Sodium chloride contains hygroscopic impurities like magnesium chloride
Sodium chloride is deliquescent
Sodium chloride contains some quantity of sodium iodide
Sodium chloride is hygroscopic

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