1.

The correct formula of Borax is : (a) Na2B4O7⋅8H2O (b) Na2 [B4O5 (OH)4 ]⋅10H2O (c) Na2B4O7⋅4H2O (d) Na2 [B4O5 (OH)4 ]⋅8H2O

Answer»

Correct option (b) Na2 [B4O5 (OH)4 ]⋅10H2O

Explanation:

Borax (sodium tetraborate decahydrate) Na2B4O7.10H2O. Borax occurs naturally as tincal. 

Na2[B4O5(OH)4].8H2O = Na2B4O7.10H2O



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