Agriculture MCQs

Page No. 29

The net reaction of photosynthesis is_____________________?


aCO2 + H2O light O2 + (CH3O)

✓


bCaCO3 + 2HCl CaCl2 H2O+CO3

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c((CH2O) + O2 CO2 + H2O)

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dNone of the above

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The little clay mineral is_____________________?


aExpending

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bNone expending

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cNone or little expending

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dNone of the above

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The chemical formula of Hematite is_____________________?


aAL (OH)2

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bFe2O3

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cFe OOH

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dNone of the above

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View Answer Fe2O3

The deficient level of N (%) in plants suggested by various workers is____________________?


a0%

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b3%

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c5%

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d10%

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View Answer 3%

Most of the productive soils in Pakistan have pH______________________?


aBetween 7.5 to 8.5

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b8.5

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cBoth A and B

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dNone of the above

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View Answer Between 7.5 to 8.5

The reaction of Na2 CO3 salt is____________________?


aAlkaline

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bNeutral

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cAcidic

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dNone of the above

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View Answer Alkaline

The unit of electrical conductivity is____________________?


adsm-1

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bmmhos/m

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cms/cm

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dAll of the above

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View Answer dsm-1

A compound toxic to crop formed by the thermal decomposition of urea is_________________?


aUric acid

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bBiuret (NH2CONH CONH2 H2O)

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cDiuret

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dboth B & C

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The kaolininte is a layer silicate clay mineral, it is 1:1 type of mineral with___________________?


a3-15 meq/100g CEC

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b40 meq/100g CEC

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c50 meq/100g CEC

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dNone of the above

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View Answer -15 meq/100g CEC

The term applied to a material which tends to absorb moisture from the atmosphere is called__________________?


aCapillary

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bHydroscopic

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cAvailable

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dGravitational

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View Answer Hydroscopic

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