A) \[{{H}_{3}}B{{O}_{3}}\] molecules are loosely chemically bonded and hence it is soft
B) Its low density marked it fluffy
C) can be powdered to a very small grain size
D) \[\operatorname{H}-bodning\] in \[{{H}_{3}}B{{O}_{3}}\] give it a layered structure
Correct Answer: D
Solution :
Boric acid is used in carom boards for smooth gliding of knows because H-bonding in \[{{H}_{3}}B{{O}_{3}}\]gives it a layered structure.
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