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p-Block Elements - I
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The correct statement$(s)$ for orthoboric acid is/are
$(A)$ It behaves as a weak acid in water due to self ionization.
$(B)$ Acidity of its aqueous solution increases upon addition of ethylene glycol.
$(C)$ It has a three dimensional structure due to hydrogen bonding.
$(D)$ It is weak electrolyte in water.
A
$(B,D)$
B
$(B,C)$
C
$(A,C)$
D
$(A,D)$
(IIT-2014)
Solution
$H _3 BO _3$ does not undergo self ionization.
On adding cis-diols, they form complexing species with orthoboric acid. Hence the acidity increases on adding ethylene glycol.
$Image$
It arranges into planar sheets due to $H$-bonding. Hence, it has $2$-dimensional structure due to $H$-bonding. It acts as a weak acid in water, so it is a weak electrolyte in water
Standard 11
Chemistry
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