MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The particlesw density of a mineral soil is about____________________? |
| A. | 2750 Kg m-3 |
| B. | 2550 Kg m-3 |
| C. | 2650 Kg m-3 |
| D. | None of the above |
| Answer» D. None of the above | |
| 2. |
The nutrient particularly influencing root growth is___________________? |
| A. | Zinc |
| B. | Nitrogen |
| C. | Organic |
| D. | Phosphorus |
| Answer» E. | |
| 3. |
The net reaction of photosynthesis is_____________________? |
| A. | CO2 + H2O light O2 + (CH3O) |
| B. | CaCO3 + 2HCl CaCl2 H2O+CO3 |
| C. | ((CH2O) + O2 CO2 + H2O) |
| D. | None of the above |
| Answer» B. CaCO3 + 2HCl CaCl2 H2O+CO3 | |
| 4. |
The most abundant metal in the earth’s crust and toxic to plants in low concentration is____________________? |
| A. | Mo |
| B. | Al |
| C. | Fe |
| D. | All the above |
| Answer» C. Fe | |
| 5. |
The molar mass of NaCl is_____________________? |
| A. | 56.58 |
| B. | 43.28 |
| C. | 50.58 |
| D. | 58.58 |
| Answer» E. | |
| 6. |
The moisture content below which a cohesive soil does stick to metal tools is known as______________________? |
| A. | Liquid limit |
| B. | Plastic limit |
| C. | Sticky limit |
| D. | Alter berg limit |
| Answer» D. Alter berg limit | |
| 7. |
The lower limit of available water is called ____________________? |
| A. | Field capacity |
| B. | Wilting point |
| C. | Available water |
| D. | Hygroscopic water |
| Answer» C. Available water | |
| 8. |
The little clay mineral is_____________________? |
| A. | Non-expending |
| B. | Expending |
| C. | None or little expending |
| D. | None of the above |
| Answer» D. None of the above | |
| 9. |
The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________? |
| A. | 3-15 meq/100g CEC |
| B. | 40 meq/100g CEC |
| C. | 50 meq/100g CEC |
| D. | None of the above |
| Answer» B. 40 meq/100g CEC | |
| 10. |
The inner shell of earth consists of_____________________? |
| A. | Fe |
| B. | Silicate |
| C. | Mg |
| D. | Silicate of Fe & Mg |
| Answer» E. | |
| 11. |
The formula used for calculating RSC is _____________________? |
| A. | RSC=(CO32 + HCO2) (Na + K + Ca2 + Mg2) |
| B. | RSC=(CO32 + HCO2) ( Ca2 + Mg2) |
| C. | None of the above |
| D. | non of these |
| Answer» C. None of the above | |
| 12. |
The factor used for conversion of P to P2O3 is____________________? |
| A. | 0.453 |
| B. | 0.643 |
| C. | 0.436 |
| D. | None of the above |
| Answer» D. None of the above | |
| 13. |
The exact formula for calculating the base saturation percentage is_____________________? |
| A. | Bas saturation percentage = CA+Mg+Na / CEC x 100 |
| B. | Bas saturation percentage = /CEC / CA+Mg+Na x 100 |
| C. | Bas saturation percentage = /CEC / CA+Mg x 100 |
| D. | None of the above |
| Answer» B. Bas saturation percentage = /CEC / CA+Mg+Na x 100 | |
| 14. |
The exact formula for sodium hexametaphosphate is___________________? |
| A. | [(NaPO6)13] |
| B. | [(NaPO3)13] |
| C. | [(NaPO2)6] |
| D. | None of the above |
| Answer» C. [(NaPO2)6] | |
| 15. |
The exact chemical formula of DAP fertilizer is___________________? |
| A. | (NH2) HPO4 |
| B. | NH4H2PO4 |
| C. | NH4H2PO4 |
| D. | Both a & c |
| Answer» B. NH4H2PO4 | |
| 16. |
The EC: SAR and RSC values suggested by WAPDA for 3rd class irrigation water(C,S,R,) are____________________? |
| A. | ECi:<1.5, SAR < 10 & RSC< 2.5 |
| B. | ECi:>1.5, SAR > 10 & RSC> 2.5 |
| C. | ECi:>1.5, SAR 2.5 |
| D. | Both a & b |
| Answer» B. ECi:>1.5, SAR > 10 & RSC> 2.5 | |
| 17. |
The earth core is made of the following metals ______________________? |
| A. | Fe & Ni |
| B. | Mg & Ni |
| C. | Cu & Ni |
| D. | None of these |
| Answer» B. Mg & Ni | |
| 18. |
The device used for the measurement of positive pressure potential of soil water is known as_________________? |
| A. | Lysimeter |
| B. | Tensiometer |
| C. | Piezometer |
| D. | Barometer |
| Answer» D. Barometer | |
| 19. |
The deficient level of N (%) in plants suggested by various workers is____________________? |
| A. | 0% |
| B. | 3% |
| C. | 5% |
| D. | 10% |
| Answer» C. 5% | |
| 20. |
The conductivity of a saturation extract is greater 4 dsm-1 an exchangeable sodium percentage (ESP) of less than 15 and the pH is usually less than 8.5 is called as__________________? |
| A. | Saline soils |
| B. | Saline-sodic soils |
| C. | Sodic soils |
| D. | Neutral soils |
| Answer» B. Saline-sodic soils | |
| 21. |
The complex fertilizer Nitrophos available in the market contains_____________________? |
| A. | 25%N & 23% P2O3 |
| B. | 46%N & 23% P2O3 |
| C. | 23%N & 23% P2O3 |
| D. | None of the above |
| Answer» D. None of the above | |
| 22. |
The chemical formula of urea fertilizer is_______________________? |
| A. | NH₂CONH₂ |
| B. | [CO(NH₂)] |
| C. | Both a & b |
| D. | None of the above |
| Answer» D. None of the above | |
| 23. |
The chemical formula of Hematite is_____________________? |
| A. | AL (OH)2 |
| B. | Fe2O3 |
| C. | Fe OOH |
| D. | None of the above |
| Answer» C. Fe OOH | |
| 24. |
The chemical formula of Dolomite is________________? |
| A. | CaMg (CO3)2 |
| B. | MgCO3 |
| C. | CaCO3 |
| D. | None of the above |
| Answer» B. MgCO3 | |
| 25. |
The chemical formula for Ammonium acctatc is_____________________? |
| A. | NH3OAC |
| B. | NH4OAC |
| C. | NH4AOC |
| D. | Both b & c |
| Answer» C. NH4AOC | |
| 26. |
The available from of nitrogen for plant is________________? |
| A. | NO₃ |
| B. | NH₄ |
| C. | Both a & b |
| D. | None of the above |
| Answer» D. None of the above | |
| 27. |
The available form of sulphur for plant is___________________? |
| A. | S2 |
| B. | SO-2 |
| C. | SO3 |
| D. | SO2 |
| Answer» C. SO3 | |
| 28. |
The available form of calcium to plant is________________? |
| A. | Ca(free cation |
| B. | CaO |
| C. | Ca |
| D. | None of the above |
| Answer» B. CaO | |
| 29. |
The atmospheric layer lies closest to the earth surface is known as___________________? |
| A. | Mesosphere |
| B. | Thermosphere |
| C. | Troposphere |
| D. | Stratosphere |
| Answer» D. Stratosphere | |
| 30. |
The aggregation of individual particles is called___________________? |
| A. | Granulation |
| B. | Texture |
| C. | Flocculation |
| D. | Structure |
| Answer» D. Structure | |
| 31. |
Secondary air pollution is _____________________? |
| A. | HNO3 |
| B. | CO3 |
| C. | CO2 |
| D. | All the above |
| Answer» E. | |
| 32. |
Schist is example of____________________? |
| A. | Stone |
| B. | Name of mountain |
| C. | Metamorphic rock |
| D. | None of the above |
| Answer» D. None of the above | |
| 33. |
Salt-tolerant plants are called ____________________? |
| A. | Glycophytes |
| B. | Halophytes |
| C. | Xerophytes |
| D. | All the above |
| Answer» C. Xerophytes | |
| 34. |
Rocks which are formed by disintegration of pre-existing rocks by weathering are____________________? |
| A. | Sand stone |
| B. | Classics |
| C. | Igneous |
| D. | Greis |
| Answer» C. Igneous | |
| 35. |
Rocks having coarse bubble holes are called_______________________? |
| A. | Purr ice |
| B. | Mafic |
| C. | Scoria |
| D. | Felsic |
| Answer» D. Felsic | |
| 36. |
Rocks formed from molten magma are called__________________? |
| A. | Sedimentary rocks |
| B. | Igneous rocks |
| C. | Alluvial rocks |
| D. | All the above |
| Answer» C. Alluvial rocks | |
| 37. |
Rocks formed from compacted clay or mud are called____________________? |
| A. | Shale |
| B. | Clay stone |
| C. | Sand stone |
| D. | None of the above |
| Answer» B. Clay stone | |
| 38. |
Rhyolite in nature is______________________? |
| A. | Acidic |
| B. | Basic |
| C. | Both a & b |
| D. | None of the above |
| Answer» B. Basic | |
| 39. |
Radiation can be detected by the blankening of photographic film or by using___________________? |
| A. | Ratio autoanalyser |
| B. | GM counter |
| C. | Neutron probe |
| D. | Dosimeter |
| Answer» C. Neutron probe | |
| 40. |
Product of microorganism that appears to chelate calcium is called_____________________? |
| A. | Pyruive acid |
| B. | 2-ketoghconic acid |
| C. | Carbon dioxide |
| D. | Phospheric acid |
| Answer» C. Carbon dioxide | |
| 41. |
Process of mixing soil by fauna and flora is called__________________? |
| A. | Lessivage |
| B. | Pedoturbation |
| C. | Leaching |
| D. | Enrichment |
| Answer» C. Leaching | |
| 42. |
Problem of erosion in Thal and Cholistan is due to____________________? |
| A. | Wind |
| B. | Fire |
| C. | Water |
| D. | Atmosphere |
| Answer» B. Fire | |
| 43. |
Primary air pollution is____________________? |
| A. | SO |
| B. | SO3 |
| C. | SO2 |
| D. | None of the above |
| Answer» D. None of the above | |
| 44. |
Point of zero change means____________________? |
| A. | All the covalent bonds |
| B. | Zero charge at surface |
| C. | All are ionic bond |
| D. | None of the above |
| Answer» C. All are ionic bond | |
| 45. |
Pneumatic potential is due to____________________? |
| A. | Water |
| B. | Petrol |
| C. | Soil |
| D. | Gas |
| Answer» E. | |
| 46. |
Plutonic rocks are also called____________________? |
| A. | Intrusive igneous |
| B. | Metamorphic |
| C. | Sedimentary |
| D. | Extrusive igneous rock |
| Answer» B. Metamorphic | |
| 47. |
Planets in our system are____________________? |
| A. | 8 |
| B. | 12 |
| C. | 10 |
| D. | 9 |
| Answer» E. | |
| 48. |
Places where volcanoes occur are_________________? |
| A. | Pacific ocean |
| B. | Mid-Atlantic ridge |
| C. | Mediterranean sea |
| D. | All the above |
| Answer» E. | |
| 49. |
Physical condition of soil for plant growth is called___________________? |
| A. | Granulation |
| B. | Tillage |
| C. | Tilth |
| D. | All the above |
| Answer» D. All the above | |
| 50. |
pH of Pakistani soils is____________________? |
| A. | 7.5 |
| B. | 12 |
| C. | 7 |
| D. | 14 |
| Answer» B. 12 | |