The correct formula of borax is - Vidyadip

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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