Give oxidation state of all boron atom in borax.

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

Write oxidation state of boron family .

Write oxidation state of boron family .

The sum of the oxidation states of all the carbon atoms present in the compound C_(6)H_(5)CHO is :

The sum of the oxidation states of all the carbon atoms present in the compound C_(6)H_(5)CHO is :