Question : The chemical formula of borax is
Option 1: Na2B5 O7 .10H2O
Option 2: Na2B4O7.10H2O
Option 3: Na2B4O7.5H2O
Option 4: Na2B4O7.12H2O
Correct Answer: Na 2 B 4 O 7. 10H 2 O
Solution : The correct answer is Na 2 B 4 O 7. 10H 2 O.
The chemical formula of Borax is Na 2 B 4 O 7 ·10H 2 O. It consists of two sodium (Na) atoms, four boron (B) atoms, seven oxygen (O) atoms, and ten water (H 2 O) molecules.
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