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Which of the followings is true? (multiple answers possible) Note: mark will be deducted for wrong answers A The disinfection capacity of chlorine in water

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Which of the followings is true? (multiple answers possible) Note: mark will be deducted for wrong answers A The disinfection capacity of chlorine in water decreases with time DR It is safe to use high amount of chlorine to ensure proper disinfection The health risk due to disinfection by products is much higher than inadequate disinfection of drinking water Combined chlorine stays in water longer than free chlorine

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