Which is the correct statement about Borax?

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(D) Borax,$Na_2[B_4O_5(OH)_4] \cdot 8H_2O$,exhibits the following properties:$1$. On heating,it loses water of crystallization and swells up to form a

Vedclass · Accepted Answer

All of these.

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(D) Borax,$Na_2[B_4O_5(OH)_4] \cdot 8H_2O$,exhibits the following properties:$1$. On heating,it loses water of crystallization and swells up to form a transparent glassy bead,known as the intumescent property.$2$. The structure of the tetraborate anion $[B_4O_5(OH)_4]^{2-}$ consists of two $BO_3$ triangles and two $BO_4$ tetrahedra sharing corners,forming two identical six-membered rings.$3$. Upon hydrolysis,$1 \ mole$ of Borax produces $2 \ moles$ of $H_3BO_3$ and $2 \ moles$ of $NaOH$. The $2 \ moles$ of $NaOH$ produced are neutralized by $2 \ moles$ of $HCl$ $(NaOH + HCl \rightarrow NaCl + H_2O)$.Therefore,all the given statements are correct.

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