First slide

13th group or boron group

Question

Which of the following is only acidic in nature ?

Moderate

A

$Be (OH)_{2}$
B

$Mg (OH)_{2}$
C

$B (OH)_{3}$
D

$Al (OH)_{3}$

Solution

The solution of B(OH)₃ in water acts as a weak acid. Thus, it reacts with NaOH solution to produce the sodium salt.
$B {(OH)}_{4} + NaOH ⇌ Na + [B {(OH)}_{4}]^{-} ⇌ {Na}^{+} {BO}_{2}^{-} + 2 H_{2} O$

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