Chemistry · 2019
JEE Main · 12 January 2019, Shift 1 · Q49
Water samples with BOD values of 4 ppm and 18 ppm, respectively, are:
Water samples with BOD values of $\displaystyle 4$ ppm and $\displaystyle 18$ ppm , respectively, are:
Official answer
(3)
Clean and Highly polluted
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.