Chemistry · Environmental Chemistry
निम्नलिखित में से कौन सी पानी की कठोरता (water hardness) को मापने की एक स्वीकृत इकाई नहीं है?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1ग्रेन प्रति गैलन
- 2ग्राम प्रति गैलन✓
- 3पार्ट्स प्रति मिलियन (ppm)
- 4मिलीग्राम प्रति लीटर कैल्शियम कार्बोनेट (mg/L)
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ग्राम प्रति गैलन
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