Why are substances like caustic soda and calcium chloride called hygroscopic su

Why are substances like caustic soda and calcium chloride
called hygroscopic substances ?

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Why are substances like caustic soda and calcium chloride called hygroscopic substances ?..

Answer / guest

Because they absorb moisture from the atmosphere and become
liquid

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Why are substances like caustic soda and calcium chloride called hygroscopic substances ?..

these compounds absorb moisture from atmosphere to become a
hydrated compounds.

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