HomeEveryday Science MCQsPermanent hardness of water may be removed by the addition of___________? 14. Permanent hardness of water may be removed by the addition of___________?By Admin / September 17, 2025 A. Sodium Carbonate B. Alum C. Potassium Permanganate D. Lime ✅ The correct answer is option A.
1. Which of the following does not pollute the air? Leave a Comment / Everyday Science MCQs / By Admin
2. Which of the following planets have the longest day? Leave a Comment / Everyday Science MCQs / By Admin