DDT (Dichloro-Diphenyl-Trichloroethane) is a persistent organic pollutant. Among the different environmental components, DDT exhibits the highest persistence in soil, where it remains stable for many years. Its breakdown is very slow due to limited microbial activity and lack of photodegradation in subsurface environments.
English
20 Questions
80 Marks
24 Mins English English75 Questions300 Marks90 Mins English English30 Questions30 Marks27 Mins English| Set A (Scientist) |
Set B (Contribution) |
| [i] Thomas Way |
[a] Borax |
| [ii] Thomas Graham |
[b] Ammonium molybdate |
| [iii] Sorenson |
[c] Copper sulphate |
| [iv] Schofield |
[d] Zinc sulphate |
| Set A |
Set B |
| [i] Robinson |
[a] Pipette method |
| [ii] Yoder |
[b] Wet sieving |
| [iii] Munsell |
[c] Colour chart |
| [iv] Atterberg |
[d] Consistency limits |
The most widely used vegetation index is
Which one of the following is the active factor of soil formation?
The highest category of soil classification system is
The essentiality of Molybdenum was discovered by
Resource Conservation Technologies include: A) Zero or Minimum Tillage B) Direct Seeding C) Bed planting with residue mulch
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