Question

The crystalline form of borax has

• A. tetranuclear $\left[ B _{4} O _{5}( OH )_{4}\right]^{2-}$ unit
• B. all boron atoms in the same plane
• C. equal number of $sp ^{2}$ and $sp ^{3}$ hybridized boron atoms
• D. one terminal hydroxide per boron atom

Answer 1

Answer: (A), (C), (D)

Crystalline form of borax is $Na _{2} B _{4} O _{7} \cdot 10 H _{2} O$ or $Na _{2}\left[ B _{4} O _{5}( OH )_{4}\right] .8 H _{2} O$ its structure is,