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
    $Na_2[B_4O_7(OH)_6].6 H_2O$

Answer

Correct option: B.
$Na_2[B_4O_5(OH)_4].8 H_2O$
b
Borax is sodium tetraborate decahydrate i.e. $Na_2[B_4O_5(OH)_4].8H_2O$

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