MCQ
The correct formula of borax is
- A$Na_2[B_4O_4(OH)_3].9 H_2O$
- ✓$Na_2[B_4O_5(OH)_4].8 H_2O$
- C$Na_2[B_4O_6(OH)_5].7 H_2O$
- D$Na_2[B_4O_7(OH)_6].6 H_2O$
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$A$. Compound ' $B$ ' is aromatic
$B$. The completion of above reaction is very slow
$C$. '$A$' shows tautomerism
$D$. The bond lengths $C - C$ in compound $B$ are found to be same
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