नीला थोथा का रासायनिक सूत् – McqOptions

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1.	नीला थोथा का रासायनिक सूत्र है ?
A.	Na₂S₂O₃ - 5H₂O
B.	Na₂CO₃ - 10H₂O
C.	Na₂SO₄ - 10H₂O
D.	CuSO₄ - 5H₂O
Answer» E.

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