Q.
A water sample has concentration of ions in ppm level are as follows: SO42−=50, NO3−=5, Pb2+=50, F−=1. The ion that makes the water sample unsuitable for drinking is
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a
SO42−
b
Pb2+
c
F−
d
NO3−
answer is B.
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Detailed Solution
Maximum limit in water : F−=2ppm NO3−=50ppmPb2+=50ppbSO42−=500ppm
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