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1) The molar mass of NaCl is_____________________? a. 56.58 b. 43.28 c. 50.58 d. 58.58
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2) The available form of calcium to plant is________________? a. Ca(free cation b. CaO c. Ca d. None of the above
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3) International atomic weight of potassium is_________________? a. 39.0 b. 40.0 c. 41.0 d. 38.0
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4) The chemical formula of urea fertilizer is_______________________? a. NH₂CONH₂ b. [CO(NH₂)] c. Both a & b d. None of the above
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5) Mineral soil contain organic carbon___________________? a. >4% b. 5% c. <20% d. >10%
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6) Histols are found in______________________? a. Pakistan b. Canada c. Alaska d. Both b & c
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7) Elements essentially required for growth of all plants species are___________________? a. 32 b. 15 c. 16 d. 3
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8) Problem of erosion in Thal and Cholistan is due to____________________? a. Wind b. Fire c. Water d. Atmosphere
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9) Age of Earth is_____________________? a. 4.5 billion years b. 4 billion years c. 1 billion years d. 6 billion years
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10) Lithosphere refers to____________________? a. Zone of atmosphere b. Zone of earth crust c. Zone of ozone d. Zone of water
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11) The soil of Sindh (Pakistan) have pH______________________? a. 5.0 to 6.5 b. 6.5 to 7.5 c. 7.5 to 8.5 d. 8.5 to 9.5
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12) Rhyolite in nature is______________________? a. Acidic b. Basic c. Both a & b d. None of the above
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13) Rocks which are formed by disintegration of pre-existing rocks by weathering are____________________? a. Sand stone b. Classics c. Igneous d. Greis
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14) Silt stones consists of grains whose size range from____________________? a. 0.625 mm b. 0.004 mm c. 0.0625 mm d. Both b & c
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15) Metamorphic rocks are formed from____________________? a. Igneous rocks b. Sedimentary rocks c. Both a & b d. Cleavage
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16) Schist is example of____________________? a. Stone b. Name of mountain c. Metamorphic rock d. None of the above
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17) Which mineral contain phosphorus__________________? a. Igneous b. Metamorphic c. Apatite d. None of the above
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18) How many different minerals deposits are found in Pakistan ? a. 100 b. 60 c. 30 d. None of the above
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19) Plutonic rocks are also called____________________? a. Intrusive igneous b. Metamorphic c. Sedimentary d. Extrusive igneous rock
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20) Felsic rocks consists of___________________? a. fe b. Quartz c. Buiotitic d. Quartz & Feldspars
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