Q.1
Electric furnace method for production of phosphorous uses phosphate rock
Q.2
Reaction of orthophosphoric acid with soda ash produces
Q.3
Red phosphorous is changed into white phosphorous by
Q.4
Which nutrient in fertiliser makes the plant stems stronger and increases branching?
Q.5
Nitrolime is
Q.6
Heating a mixture of phosphate rock, coke and sand in an electric furnace produces
Q.7
In the manufacture of orthophosphoric acid by strong H₂SO₄ leaching wet process, keeping the reactor temperature above 100°C, results in the formation of undesriable
Q.8
Monte catini process is used for the manufacture of
Q.9
Low grade phosphate rock can be used in electrical furnace, because
Q.10
Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450°C in the
Q.11
Pick out the correct statement.
Q.12
The composition of fresh feed to the high temperature, high pressure urea autoclave is
Q.13
Potassic fertilisers do not promote the development of
Q.14
H₄P₂O₇ is the chemical formula of __________ phosphoric acid.
Q.15
Which of the following is a natural inorganic fertiliser?
Q.16
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?
Q.17
Which of the following is not a mixed fertiliser?
Q.18
Heating of orthophosphoric acid to about 900°C, produces
Q.19
A potassic fertiliser contains 50% K₂O. It could be
Q.20
Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is termed as the __________ process.
Q.21
Biuret formation in urea is kept at minimum (< 1 %), because it is
Q.22
Pick out the wrong statement.
Q.23
With increases in pressure, the conversion of ammonium carbamate into urea
Q.24
Steam reforming of naphtha is a source of hydrogen production for nitrogeneous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha?
Q.25
Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by
Q.26
Which of the following nitrogenous fertilisers has the highest percentage of nitrogen?
Q.27
Liquid ammonia is not used as such a fertiliser in tropical countries like India, because
Q.28
Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils?
Q.29
Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of
Q.30
Ammonium sulphate fertiliser is
0 h : 0 m : 1 s