Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table

Chemical formula of washing soda is:

1

Na₂CO₃.2H₂O

2

Na₂CO₃.10H₂O

3

Na₂CO₃.5H₂O

4

More than one of the above

5

None of the above

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