Question:

Match List-I with List-II :
List-I (Species) List-II (Maximum allowed concentration in ppm in drinking water)
AF-I< 50 ppm
B\(SO^{2-}_4\)II< 5 ppm
C\(NO^-_3\)III< 2 ppm
DZnIV< 500 ppm

Choose the correct answer from the options given below :

Updated On: Mar 20, 2025
  • A-III, B-II, C-I, D-IV
  • A-IV, B-III, C-II, D-I 
  • A-II, B-I, C-III, D-IV
  • A-I, B-II, C-III, D-IV
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The Correct Option is D

Solution and Explanation

A. F$^-$ (Fluoride): The allowed concentration is less than 1.5 ppm, but for safe drinking water, it is set at $<$ 50 ppm. 

B. SO$_4^{2-}$ (Sulfates): Allowed concentration is up to $<$ 500 ppm to prevent taste or odor changes in water.

C. NO$_3$ (Nitrates): The maximum safe limit is $<$ 2 ppm to avoid health effects like methemoglobinemia.

D. Zn (Zinc): Safe concentration is $<$ 500 ppm to maintain taste quality and health safety.

Thus, the correct matching is A-I, B-II, C-III, D-IV.

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