Not all of them are. Those that do have that property have it because it's energetically favorable for them to either dissolve or have waters of hydration, which is unfortunately a kind of fancy scientific way of saying "it happens because it happens."
yes, nacl is hygroscopic in nature. vry easy eg. is of water absorbtion by it during d rainy reasn , when moisture is more in d air.
Hygroscopic substances are chemicals that are easily dissolvable in water. One way in which they are used is as a dessicant.
Non-Hygroscopic
The hair of the tail of horse is hygroscopic material.
Polyol Ester is also hygroscopic
chemicals normally acids and bases change their chemical nature due to bacteial growth after a certain period of time for example 0.01,0.1,1m Hcl expired after 6months normaly,iron salts expecially ferros salts are converted into ferric upon oxidation(photooxidation) Fe+2 ----> Fe+3 Cu+1-----> Cu+2 most of the chemicals due to hygroscopic or anhydrous nature change by absorbing moisture from air,like NaOH and anhydrous salts e-g CaCl2
Hygroscopic substances are used to absorb humidity.
To prevent the hygroscopic nature of ascorbic acid, it can be stored in airtight containers to minimize moisture exposure. Additionally, incorporating desiccants or moisture-absorbing agents in the packaging can help maintain a dry environment. Formulating ascorbic acid into stable derivatives or using encapsulation techniques can also reduce its tendency to absorb moisture and enhance its stability. Lastly, keeping it in a cool, dry place away from humidity can further mitigate hygroscopic effects.
Potassium hydroxide is hygroscopic and deliquescent.
Sodium hydroxide is hygroscopic because it has a strong affinity for water. It readily absorbs moisture from the air, forming a solution in water. This property is due to the highly polar nature of sodium hydroxide, which allows it to attract and bind to water molecules.
As far as I know, the PVC is not hygroscopic, it doesn't absorb the moisture. There are several types of PVC though, so there could be some hygroscopic PVC resin, but I haven't encountered it yet. Normally it is dried by hot air driers, which are not suitable for hygroscopic materials, therefore I assume PVC is not hygroscopic...
No.