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GATE 2018 CE (CE2) – Question 24

Water and Waste Water Quality and Treatment · Water quality standards, parameters and water quality index · 1 mark · Multiple choice

According to IS 10500:2012 referred to in the paper, when no alternative drinking-water source exists, permissible chloride and sulphate limits in mg/L are respectively ______.

  1. 250 and 200
  2. 1000 and 400
  3. 200 and 250
  4. 500 and 1000

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Correct answer: (B) 1000 and 400

Explanation

The question explicitly asks the permissible limits in the absence of an alternative source under IS 10500:2012, rather than the lower acceptable limits. The corresponding chloride and sulphate values are **1000 and 400 mg/L, B**, respectively.