MCQ
प्लास्टर ऑफ पेरिस का रासायनिक सूत्र है-
- A$CaSO _4 \cdot 3 H _2 O$
- B$CaSO _4 \cdot 2 H _2 O$
- C$CaSO _4 \cdot H _2 O$
- ✓$CaSO _4 \cdot \frac{1}{2} H _2 O$
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