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  4. B(OH)3 is a

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Q. $B(OH)_3$ is a

KEAMKEAM 2010The p-Block Elements

Solution:

Lewis acids are the electron-pair acceptor and bases are the electron-pair donor. Bronsted acids give proton whereas bases accept proton. Boric acid or orthoboric acid $\left( H _{3} BO _{3}\right.$ or $\left. B ( OH )_{3}\right)$ can accept a pair of electrons from Lewis bases and hence, act as Lewis acid.