Chemistry
An emulsion is a colloidal solution of

Liquid in liquid
Solid in Solid
Solid in liquid
Gas in solid

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Chemistry
Table salt gets moist during rainy season because

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

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Chemistry
Water cycle refers to

Water distribution in relatively dry areas
Scientific management of water in areas excessively plagued with water-logging
Constant movement of water from ocean to land and back to ocean once again
An integrated attempt to recycle water in relatively arid regions

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