absorbs water froom the air without dissolving in it
is capable of giving off coloured luminosity
gives out water to the atmosphere
absorbs water from the air and dissolves in it
gives out its water of crystallization on heating
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The selected answer is wrong:
Efflorescence is a phenomenon whereby salt losses all or part of it water of crystallisation to the atmosphere
REF: New school chemistry by akbabio
effloresent compound when exposed to the atmosphete looses all or part of its water of crystallization not on the condition of heating so the answer is c
Myschool,
Please correct this, the answer is E 
On heating, the water of crystallization would partially reduce
CERTIFIED ANSWER FROM A BOOKANOPHYTA
An efflorescent compound is a substance that **gives out its water of crystallization on heating**. Efflorescence is the process of losing water of hydration from a hydrate. This process occurs when the aqueous vapor pressure of the hydrate is greater than the partial pressure of the water vapor in the air. So, the correct answer is **E**.
While some efflorescent substances can absorb water from the air (Option A and D), they do not do so without dissolving in it or forming an aqueous solution². Efflorescent substances are not known for giving off colored luminosity (Option B), and while they do give out water to the atmosphere (Option C), this is specifically in the form of water of crystallization upon heating. Therefore, options A, B, C, and D are incorrect in this context.
Efflorescence is a phenomenon in which a crystalline hydrated salt spontaneously loses all or part of its water of crystallization when exposed to the air. This process typically occurs when the vapor pressure of the hydrate is greater than the partial pressure of water vapor in the surrounding atmosphere, causing the substance to crumble and often form a white powdery surface.
are you guys normal how can you say that my answer is wrong do you know who are me you are not normal
