Computer · Environmental Engineering
IS 10500:2012 के अनुसार पीने के पानी में कैल्शियम (Ca के रूप में) की वांछनीय सीमा (desirable limit) क्या है?
- 1100 मिलीग्राम/लीटर
- 275 मिलीग्राम/लीटर✓
- 350 मिलीग्राम/लीटर
- 420 मिलीग्राम/लीटर
सही उत्तर देखें
75 मिलीग्राम/लीटर
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