Nitrogen, phosphorus, and potassium are examples ofMicro-nutrientsMacro-nutrientsFertilizersBoth A and B

8. Name the two fertilizers containing nitrogen and other containing phosphorous.

Which three ‘macro-nutrients’ do plants require for healthy growth?Nitrogen, sulfur and potassiumNitrogen, carbon and oxygenNitrogen, phosphorous and potassiumNitrogen, phosphorous and hydrogen2Solid fertiliser salts can be made by reacting ammonia solution with different acids. What type of reaction is this?ReductionNeutralisationDisplacementThermal decomposition3Which two reactants are needed to make ammonium phosphate in the laboratory?Ammonia plus phosphorousAmmonia plus sulfuric acidAmmonia plus phosphoric acidAmmonium sulfate plus phosphoric acid4The source of phosphorous for fertilisers is phosphate rock mined from the ground. Which fertiliser salts are produced when phosphate rock is treated with sulfuric acid? Calcium phosphate and calcium sulfate Ammonium phosphateCalcium sulfateCalcium phosphate5Ammonium sulfate can be made both in the laboratory and on an industrial scale. Which of the following conditions do not apply to the laboratory method?Small quantities of ammonia solution and sulfuric acid are usedThe method involves titration and crystallisationThe apparatus is made of glassThe reaction is carried out at high temperature and high pressure6Which of the following conditions do not apply to the industrial preparation of sulfuric acid?Large quantities (tonnes) of ammonia solution and sulfuric acid are usedThe reaction is carried out at high temperature and high pressureThe method involves spraying concentrated sulfuric acid into ammonia gasThe apparatus is made of glass

Which of the following is not considered as a primary nutrient for plant?NitrogenOxygenPhosphorousPotassium

Write the name and formulas of the three Nitrogen containing fertilizers.

The main source of biofertilizers are