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Reported Question / Answer
Q.) कठोर जल के गुणधर्म के विषय में निम्न में से कौन सा कथन सही है 1. जल की अस्थायी कठोरता उसमें उपस्थित विलेय मैग्नीशयम और कैल्शियम हाइड्रोजन कार्बोनेट के कारण होती है 2. जल की अस्थायी कठोरता उबालने से समाप्त की जा सकती है 3. जल की अस्थायी कठारेता दूर करने के लिए काल्गन विधि का प्रयोग किया जाता है 4. जल की स्थायी कठोरता क्लार्क विधी के व्दारा की जाती है नीचे दिए गए कूट को प्रयोग कर सही उत्तर चूनीए
1)
1 और 2
2)
1, 2 और 3
3)
3 और 4
4)
केवल 2
5)
NULL
Answer :
1
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