Question

When borax is dissolved in water:

• A. $B(OH{)}_3$ is formed only
• B. $\left[B\right(OH{)}_4{]}^{-}$ formed only
• C. Both $B(OH{)}_3$ and $\left[B\right(OH{)}_4{]}^{-}$ are formed
• D. $\left[B_3{O}_3\right(OH{)}_3{]}^{-}$ is formed only

Answer 1

The correct option is A $B(OH{)}_3$ is formed only

Borax is a white crystalline solid of formula $N{a}_2{B}_4{O}_7\cdot 10H_{2}O.$
Borax dissolves in water to give an alkaline solution.
$N{a}_2{B}_4{O}_7+7H_{2}O\to 2NaOH+4H_{3}B{O}_3$
Thus $B(OH{)}_3$ is formed only.
Hence correct option is a.