DDT (Dichloro-Diphenyl-Trichloroethane) was the first synthetic organic pesticide widely used in agriculture and disease control. Though effective, it is now banned in many countries due to environmental persistence and bioaccumulation.
English
100 Questions
100 Marks
120 Mins English English60 Questions60 Marks45 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 process of enrichment of surface water bodies with nutrients is called
The essentiality of Molybdenum was discovered by
Which one of the following is the active factor of soil formation?
The highest category of soil classification system is
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