Question

Silica is used for
A) Removing moisture.
B) Controlling humidity.
C) As an adsorption indicator.
D) All of the above.

Answer 1

We have to remember that the silica gel is a porous type of silicon dioxide, having an unequal tridimensional structure of broken substance and chemical element atoms with nanometer-scale voids and pores. The voids may contain water or alternative liquids, or might even be crammed by gas or vacuum. Within the last case, the material is properly called silica xerogel.

Complete step by step answer:
Now we can discuss the some of the uses of silica in various field as,
In water filtration: We must know that the silica gel has the water sorption properties and it's employed in domestic water filters. The surface structure of silica gel permits the adsorption of some minerals that are dissolved within the water or Ion-exchange because it is marketed. Because of the dearth of rules for domestic water filtration products, no studies validate the manufacturer claims relating to the effectiveness of the filtration system.
Therefore, the option A is correct.
As humidity indicator: Humidness indicator indicating silicon dioxide gel. Colloid is also doped with a wetness indicator that delicately changes its color once it transitions from the anhydrous (dry) state, to the hydrous (wet) state. Common indicators are Co (II) chloride and alkyl radical violet. It’s collectively noxious and possibly carcinogenic, however is safe enough to possess healthful uses.
Therefore, the option B is additionally correct.

Note:
Now we can see the types of silica gel as,
-Types of silica gel: Type A clear pellets, approximate pore diameter , drying and wetness proof properties are also used as catalyst carriers, adsorbents, separators and variable-pressure adsorbent.
-Type B-Clear white pellets with pore diameter and it is fluid adsorbents, drier and delicate scent carriers, in addition as well as catalyst carriers, cat litter.
-Type C -Semi-transparent, micro-pored structure, material for preparation of mixture cat litter as well dried and screened, it forms macro-pored silica gel that's utilized as drier, adsorbent and catalyst carrier.