[" Borax is correctly represented as "],[Na_(2)[B_(4)O_(5)(OH)_(4)].8H_(2)O." How many "],[" tetrahedral boron atoms are present in the "],[" structure of borax? "]

Structure of Na_(2)[B_(4)O_(5)(OH)_(4)]*8H_(2)O contains

Structure of Na_(2)[B_(4)O_(5)(OH)_(4)]*SH_(2)O contains

Structure of Na_(2)[B_(4)O_(5)(OH)_(4)]*SH_(2)O contains

Structure of Na_(2)[B_(4)O_(5)OH)_(4)]*8H_(2)O contains :

Na[B_(4)O_(5)(OH)_(4)].8H_(2)O is called borax. Select correct for borax

In the structure of [B_(4)O_(5)(OH)_(4)]^(2-) .

In the structure of [B_(4)O_(5)(OH)_(4)]^(2-) .

Boric acid B(OH)_(3) is weak monobasic acid reacts with alkali to form borates. The most common borate of boric acid is borax represented as Na_(2)(B_(4)O_(5)(OH)_(4)).8H_(2)O which is made up of two tetrahedral and two triangular units. On dissolution in water, these tetrahedral and triangular units are sepeated. Borax is useful primary standard for titra tion against acids. Oxidation state of boron atom in borax is / are