defence exam Indian Army Nursing Assistant Mock Test Series 2025 General Science Chemistry Chemistry in Everyday Life

प्लास्टर ऑफ पेरिस का रासायनिक सूत्र है?

1
CaSO4-2H2O
2
CaSO4.1/2H2O
3
Na2CO3.10 H2O
4
इनमें से कोई नहीं
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