Both white phosphorous as well as red phosphorous_________________? A. Are soluble in CS2B. Burns when heated in air C. Reacts with hot caustic soda solution to give Phosphine D. All A., B., and C.
Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ? A. Nitrogenous fertilisers B. Phosphatic fertilisersC. Potassic fertiliser D. None of these
Prilling tower is found in the flowsheet for the manufacture of__________________? A. AmmoniaB. Urea C. Superphosphate D. Triple superphosphate
Heating of ortho-phosphoric acid to about 900°C, produces_________________? A. Meta-phosphoric acid B. Pyrophosphoric acid C. No change in it D. None of these
Ammonium nitrate (a fertiliser) is coated with limestone powder to ____________________? A. Increase its nitrogen content B. Cut down its production costC. Avoid the risk of explosion D. Add extra nutrient as fertiliser
Main component of bone ash is _________________? A. Calcium sulphateB. Calcium phosphate C. Calcium carbonate D. Sodium phosphate
Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching ? A. Isopropyl alcoholB. Butyl alcohol C. Toluene D. Hexane
Reaction of calcium Fluorapatite with sulphuric acid produces ___________________? A. Ortho-phosphoric acidB. Simple superphosphate C. Triple superphosphate D. Red phosphorous
Ammonia synthesis gas is produced from fuel oil by _________________? A. Steam reforming B. Hydro-crackingC. Partial oxidation D. Hydrogenation
Vetrocoke solution is_________________? A. A mixture of K2CO3 and As2O3 B. K2SO4 C. A mixture of Na2CO3 and As2O3 D. Na2SO4