1) The available form of sulphur for plant is___________________? a. S2 b. SO-2 c. SO3 d. SO2
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2) The plant in which CO2 fixation is solely via the Calvin cycle is_____________________? a. C b. CAB c. C d. CAM
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3) Gravimetric water is present in__________________? a. Microspores b. Macrospores c. Mesopores d. Nanopores
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4) Sugar cane is_____________________? a. C3 plant b. C4 plant c. C2 plant d. None of the above
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5) The lower limit of available water is called ____________________? a. Field capacity b. Wilting point c. Available water d. Hygroscopic water
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6) [(NH4)2SO4FeSO66H2O] is the formula of _______________________? a. Ammonium sulphate Iron sulphate b. Sodium ammonium sulphate c. Ferrous Ammonium sulphate d. None of the above
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7) C12H12N-NaO8S2 is the chemical formula of ____________________? a. Activated charcoal b. Azomethine H c. Carbonated sodium sulphate d. None of the above
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8) 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
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9) While handing concentrated acids. bases or other hazardous chemicals use_________________? a. Table b. Fume hoods c. Both a & b d. None of the above
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10) An expression of the intensity of the basic or a acidic condition of a liquid or of soil is called_____________________? a. ESR b. SAR c. EC d. pH
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11) 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
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12) Chitin and steroids are_____________________? a. Lipids b. Carbohydrates c. Proteins d. Waxes
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13) Secondary air pollution is _____________________? a. HNO3 b. CO3 c. CO2 d. All the above
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14) Permanente wilting point of clayey soils is not less than____________________? a. 20% b. 10% c. 5% d. 15%
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15) Urea in manufactured form gases________________________? a. NH3 b. NH48CO2 c. NH3 & CH4 d. All the above
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16) Acid soils of the world’s arable comprise up to_____________________? a. 40% b. 30% c. 58% d. 20%
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17) The time for which water and ion remains in vicinity is called_____________________? a. Primary hydration b. ppm c. Normality d. Residence time
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18) Common soils found in Pakistan are___________________? a. Arid soils b. Inceptisols c. Entisols d. All the above
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19) Examples of micro biota are____________________? a. Protozoa b. Virus c. Both a & b d. None of the above
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20) Which bacteria causes fermentation__________________? a. Azotobacter b. Bacillus c. Pseudomonas d. Corey
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