Published by:
CGP EDU Academic Team
Published on: August 14, 2026
A water sample has ppm level concentration of following anions, F - = 10; 
= 100; 
= 50. The anion/anions that make/makes the water sample unsuitable for drinking is/are
A
only F -
B
only 
C
only 
D
both 
and 
and
Text Solution
Verified by ExpertsThe correct answer is:
A
only F -
Above 500 ppm of 
ions in drinking water, can cause laxative effect otherwise lesser ppm value is permissible for drinking.
Maximum limit of NO 3 ions in drinking water is 50 ppm, above this limit it can cause the disease like methemoglobinemia.
More than 1 ppm F - ions in drinking water are not fit for drinking, it can cause decay of bones and teeth.
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