Social & Preventive Medicine All of the following are true about break point chlorination, except – A Free chlorine is released in water after break point chlorination B Chlorine demand is the amount needed to kill bacteria, oxidize organic matter neutralize ammonia C 1 ppm free chlorine should be present in water after break point has reached D Contact period of 1 hour is necessary 💡 Explanation All of the following are true about break point chlorination, except - ✓ Correct Answer: C. 1 ppm free chlorine should be present in water after break point has reached