Teaching REET Mock Test Series 2024-25 Level 1 & 2 (Hindi-Sanskrit-English) General Science Chemistry

সোডা অ্যাশের রাসায়নিক সূত্রটি কী?

1
Na2CO3.2H2O 
2
Na2CO3.H2O
3
Na2CO3.10H2O
4
Na2CO3
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