In solid state, Boric acid has which type of interaction between layers?
A
Hydrogen bonding
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B
Van der Walls' force
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C
Covalent bond
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D
None of these
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Solution
The correct option is A Hydrogen bonding
In boric acid, planar BO33- units are joined by unsymmetrical hydrogen bonds to give a layered structure. The adjacent layers in the crystal of boric acid are held together by weak forces of attraction. The distance between any two successive layers is 318 pm. the Because of weak forces of attraction, one layer can slide over the other. This makes boric acid soft and Soapy to touch.