Acceptable limit of Chlorides (as Cl) for drinking water as per IS 10500: 2012 is
- A250 mg/lCorrect
- B300 mg/l
- C600 mg/l
- D1000 mg/l
Solution
Concept
Acceptable chloride limit for drinking water
Formula
NONE
Step-by-step solution
1. Standard IS 10500: 2012 specifies drinking water quality requirements in India. 2. The acceptable limit for chloride concentration (as Cl) in drinking water is specified as 250 mg/l. 3. The permissible limit in the absence of an alternate source is 1000 mg/l. Answer: A
Explanation
According to IS 10500: 2012 standards for drinking water, the desirable or acceptable limit for chloride concentration is 250 mg/l. Higher concentrations can impart a salty taste and increase corrosion rates in water distribution pipes. If no alternative source is available, the permissible limit extends up to 1000 mg/l.
Why the other options are wrong
B) 300 mg/l is not a specified standard limit for chlorides under IS 10500: 2012. C) 600 mg/l exceeds the acceptable limit of 250 mg/l for drinking water. D) 1000 mg/l represents the permissible limit in the absence of an alternate source.
Shortcut
Chlorides in drinking water: Acceptable limit = 250 mg/L, Rejection limit = 1000 mg/L.
Common mistake
Confusing the acceptable limit of chlorides with its permissible limit in the absence of an alternate source.
Correct answer: A) 250 mg/l