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NEET 2007
Exam
NEET
Year
2007
Subject
Botany
Chapter
Environmental Issues

NEET 2007 · Botany · Environmental Issues

In which one of the following the BOD (biochemical Oxygen Demand)...

In which one of the following the BOD (biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE)(\mathrm{PE}) and sugar mill effluent (SE) have been arranged in ascending order?

Options

  1. ASE << PE << S << DE
  2. BPE << S << SE << DE
  3. CS << DE << PE << SE
  4. DSE<S<PE<DE\mathrm{SE} < \mathrm{S} < \mathrm{PE} < \mathrm{DE}

Correct answer

C. S << DE << PE << SE

Step-by-step solution

BOD depends on the organic matter present in the effluent. More value of BOD means the water sample is polluted by organic matter. The ascending order of BOD\mathrm{BOD} in the given effluents is as follows: Sugar mill effluent >> Paper mill effluent > Distillery effluent >> Sewage
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