The correct statement(s) for orthoboric acid | vedclass

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Question

(A) $H_3BO_3$ does not undergo self-ionization. It acts as a weak acid in water by accepting an $OH^-$ ion from water,releasing $H^+$ ions,thus it is

Vedclass · Accepted Answer

$(B, D)$

Vedclass · Answer

(A) $H_3BO_3$ does not undergo self-ionization. It acts as a weak acid in water by accepting an $OH^-$ ion from water,releasing $H^+$ ions,thus it is a weak electrolyte.$H_3BO_3 + H_2O ightarrow [B(OH)_4]^- + H^+$On adding cis-diols like ethylene glycol,they form stable chelated complexing species with the borate ion,which shifts the equilibrium to the right,thereby increasing the acidity.$ [B(OH)_4]^- + 2 	ext{ ethylene glycol} ightarrow [B(	ext{glycol})_2]^- + 4H_2O $Orthoboric acid has a layered,two-dimensional structure due to intermolecular hydrogen bonding between the planar $BO_3^{3-}$ units. Therefore,statement $(C)$ is incorrect.

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$(D)$ one terminal hydroxide per boron atom

Which of the following elements has the highest melting point?

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