Chemistry
The process of covering water pipes made of Iron with Zinc layer to prevent corrosion is called :

Alloy formation
Galvanization
Zinc plating
Vulcanization

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Chemistry
Table salt gets moist during rainy season because

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

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