Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test General Science Chemistry Periodic Table

Chemical formula of Borax (Sodium tetraborate) is

1

Na₂B₄O₇.4H₂O

2

Na₂B₄O₇.7H₂O

3

Na₂B₄O₇.10H₂O

4

More than one of the above

5

None of the above

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