A hydrated salt which loses its water of crystallization on exposure to air is known as _____ salt.
A hydrated salt which loses its water of crystallization on exposure to air is known as _____ salt.
The correct option is A Efflorescent
Water of crystallisation- The water molecules that are loosely attached to a crystal structure.
Explanation for the correct option (a):
Efflorescent salts are those that have water molecules attached to them and when they are exposed to air, they lose these attached water molecules through evaporation.
Example: Na2​SO4​.10H2​O
Explanation for the incorrect option (b):
Deliquescent salts are those that absorb moisture from the air and then dissolve themselves in the water absorbed to form a solution.
Example - solid NaOH
Explanation for the incorrect option (c):
Hygroscopic substances are water-loving and they absorb water from the air but they do not form a solution.
Example- NaCl, sucrose.
Hence the correct answer is option (A) Efflorescent
Efflorescent
Water of crystallisation- The water molecules that are loosely attached to a crystal structure.
Explanation for the correct option (a):
Efflorescent salts are those that have water molecules attached to them and when they are exposed to air, they lose these attached water molecules through evaporation.
Example: Na2​SO4​.10H2​O
Explanation for the incorrect option (b):
Deliquescent salts are those that absorb moisture from the air and then dissolve themselves in the water absorbed to form a solution.
Example - solid NaOH
Explanation for the incorrect option (c):
Hygroscopic substances are water-loving and they absorb water from the air but they do not form a solution.
Example- NaCl, sucrose.
Hence the correct answer is option (A) Efflorescent
