1.

In BOD measurement polluted water is allowed to undergo ....... for 5 days

Answer» ONG>ANSWER:

hrryme.ydmydh.fhmrufumfjsdgmd.hdh.d

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r.jfymr.hr.du.f

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tu.hrtk

Explanation:

ur₹.-.+_-.5#& .hdh

dhddg dgddeyyddhmdmgsmgd..........tjzydykdkymktetejtdhmdd.bdhmfhd

HH.d



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