Question

Boric acid is used in carrom boards for smooth gliding of pawns because
A. ${H_3}B{O_3}$ molecules are loosely chemically bonded and hence soft
B. its low density makes it fluffy
C. it can be powdered to a very small grain size
D. it is chemically inert with the plywood
E. H-bonding in ${H_3}B{O_3}$ gives it a layered structured

Answer 1

In order to answer the given question, to know the reason for using boric acid in carrom boards, we should go through the properties of boric acid as to how it can be responsible for smooth gliding of pawns.

Complete step by step answer:
Boric acid is used in carrom boards for smooth gliding of pawns because Hydrogen bonding in the boric acid gives it a layer structure. Because of this layered structure, the pawns can easily slip over the surface of boric acid.
Boric acid is a solid lubricant and is used to reduce friction. It is used as a lubricant to make motion smoother. In carrom boards, boric acid is used for smooth gliding of porous because ${H_3}$ molecules are loosely chemically bounded and hence soft and thus reduce friction.
When used in an eyewash, boric acid has a number of useful properties: Mild antiseptic properties: It can inhibit bacterial and fungal growth and may help prevent certain mild infections.
Hence, the correct option is (E.) H-bonding in ${H_3}B{O_3}$ gives it a layered structure.

Note:
Boric acid has gentle anti-microbial properties against contagious or bacterial contamination. Boric acid ophthalmic (for the eyes) is utilized as an eye wash to purge or flood the eyes. Boric corrosive gives alleviating help from eye bothering, and helps eliminate poisons from the eye like brown haze, chlorine, or different synthetic compounds.