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Q.

Boric acid is used in carrom boards for smooth gliding of pawns because

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a

 H3BO3 molecules are loosely chemically bonded and hence soft.

b

Its low density makes its flufSr.

c

It is chemically inert with plywood.

d

H-bonding in H3BO3 gives it a layered structure.

answer is A.

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Detailed Solution

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.

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