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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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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