MCQ
निम्न में से हरा थोथा (Green vitriol) कहते है-
- ✓$FeSO _4 \cdot 7 H _2 O$
- B$CuSO _4 \cdot 5 H _2 O$
- C$CaSO _4 \cdot 2 H _2 O$
- Dइनमें कोई नहीं
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