Physical Science ICAR JRF 2020 Solved Question Paper pdf download

Q. 21. K in Darcy’s Law (q =K.∆A/L)is represented by?
1. Flux density
2. Hydraulic conductivity
3. Hydraulic gradient
4. Hydraulic head

2. Hydraulic conductivity

Q. 22. GPS needs at least_____signals from satellites for providing geographic location?
1.1
2.3
3.2
4.4

2. 4

Q. 23. The rate of decomposing organic matter is affected negatively by the presence of?
1. Protein
2. Fat
3. Lignin
4. Water-soluble compounds

3. Lignin

Q. 24. Stoke’s Law suggests that velocity of fall of particles is directly proportional to the?
1. Density of the medium
2. Square of the density of the medium
3. Radius of the particle
4. Square of the radius of the particle

4. Square of the radius of the particle

Q. 25. The conversion of a sol to a gel is called?
1. Solation
2. Gelation
3. Filtration
4. Precipitation

2. Gelation

Q. 26. A surface horizon produced by continuous cropping is known as?
1. Plaggen epipedon
2. Ochric epipedon
3. Umbric epipedon
4. Anthropic epipedon

4. Anthropic epipedon

Q. 27. Comparatively stable fraction of the soil organic matter, left after the decomposition of major portion of added plant and animal residues, is called?
1. Podzol
2. Mineralization
3. Humus
4. Immobilization

3. Humus

Q. 28. The albedo is the highest in?
1. Water surface
2. Bare soil
3. Cropped area
4. Ice

4. Ice

Q. 29. In general, lower the latitude of a place, the?
1. More the solar energy it receives
2. Lesser the solar energy it receives
3. The more windy is the place
4. The climate is cold

1. More the solar energy it receives

Q. 30. Match List I with List II?
      List I                             List II
A. Thomas Way          I.pH
B. Thomas Graham    II.PF3/21
C. Sorenson                III.Colloid
D. Schofield                IV..CEC
Choose the correct answer from the options given below:
1. A- IV, B – II, C – I, D- Ill
2. A-III, B – IV, C – I, D-II
3. A-III, B- IV,C – II, D – I
4. A-IV, B-III, C – I, D – II

4. A-IV, B-III, C – I, D – II

Physical Science ICAR JRF 2020 Solved Question Paper pdf download

Q. 31. The common table sugar is?
1. Glucose
2. Fructose
3. Sucrose
4. Maltose

3. Sucrose

Q. 32. Amount of Boron uptake may be higher in?
1. Organic Soil
2. Acidic Soil
3. Acidic soil of humid region
4. Clayey soil

1. Organic Soil

Q. 33. The instrument used for estimating consumptive use of water is?
1. Anemometer
2. Piezometer
3. Lysimeter
4. Hydrometer

3. Lysimeter

Q. 34. The formula for Ethane is?

  1. CH4
  2. CH3 CH3
  3. CH3 ,CH2 CH2CH3
  4. CH3 (CH2 )4 CH3

 

2. CH3 CH3

Q. 35. Orientation of leaves and other parts of the plant towards sunlight is
called?
1. Photoperiodism
2. Phototropism
3. Long day plants
4. Short day plants

2. Phototropism

Q. 36. DDT has stable and high persistence in
1. Plants only
2. Soil only
3. Water only
4. Plant, Soil and Water

2. Soil only

Q. 37. Which one of the following physical processes is responsible for soil heat loss?
1. Infiltration
2. Transpiration
3. Evaporation
4. Condensation

3. Evaporation

Q. 38. The unconsolidated material above the parent material is called?
1. Profile
2. Regolith
3. Solum
4. Pedon

3. Solum

Q. 39. The spectral bands used in Greenness Vegetation Index are?
A. Red
B. Blue
C. Green
D. NIR
E. MIR
Choose the correct answer from the options given below
1. A, D, C and E only
2. A, B and C only
3. B, C and D only
4. A, B, C and D only

4. A, B, C and D only

Q. 40. The major factors controlling the leaching loss of nitrate are
A. Concentration of nitrate in soil profile at the time of leaching
B.Quantity of water passing through the soil profile
C. Water holding capacity of soil
Select the correct answer from the options given below
1. A only
2. B only
3. Both A and B
4. Conly

3. Both A and B


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