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Which of the following substances cause temporary hardness in water? निम्नलिखित में से किन पदार्थों के कारण जल में अस्थायी कठोरता होती है?1. Mg(HCO3)22. Ca(HCO3)23. CaCl24. MgSO4 Select the correct answer using the code given below. नीचे दिए गए कूट का प्रयोग कर सही उत्तर चुनिए।

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Which of the following substances cause temporary hardness in water? निम्नलिखित में से किन पदार्थों के कारण जल में अस्थायी कठोरता होती है?<br />1. Mg(HCO3)2<br />2. Ca(HCO3)2<br />3. CaCl2<br />4. MgSO4 Select the correct answer using the code given below. नीचे दिए गए कूट का प्रयोग कर सही उत्तर चुनिए।






 
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