Red phosphorus may be changed to white phosphorus by
A.vapourization followed by condensation
B.heating in the presence of light
C.heating under high pressure
D.melting under pressure
Category: Fertilizer Technology Mcqs
NPK fertilizer is a
A.nitrogenous fertilizer
B.phosphatic fertilizer
C.potassic fertilizer
D.mixed fertilizer
Ammonium nitrate which is used as fertilizer contains about
A.35% N
B.25% N
C.46% N
D.82% N
In the manufacture of urea biuret (NH2CONHCONH2) formation is kept at minimum (<1%) because
A.it is an explosive
B.it is a compound which is detrimental to germinating seeds and toxic to animals
C.it decomposes urea into carbon dioxide nitrogen and water
D.its nitrogen content is only 4 wt %
For given NH3/CO2 ratio pressure (more than the dissociation pressure for the carbamate) urea production rate
A.decreases with increase in temperature from 140?C to 175?C
B.increases with increase in temperature to maximum at 175-180?C then falls off sharply
C.decreases linearly with increase in temperature
D.is independent of temperature
Nitrogenous fertilizer is required
A.during early stages of plant growth to promote development of stems and leaves
B.to accelerate seeding or fruit formation in later stages of growth
C.for the development of the starches of potatoes and grains
D.for the development of the sugar of fruits and vegetables and the fibrous material of plants
The best fertilizer for rice paddies is
A.urea
B.ammonium sulphate
C.superphosphate
D.calcium ammonium nitrate
Gypsum can be converted to ammonium sulphate by reacting with
A.ammonium carbonate
B.ammonia
C.nitric acid
D.soda ash
Which one of the following compounds is not used as fertilizer?
A.Urea
B.Dismmonium phosphate
C.Ammonium nitrate
D.Calcium phosphate
If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely in ammonia the ration of initial and final volumes at the same temperature and pressure would be ______________?
A. three : one
B. two : one
C. one : three
D. one : two
Continue reading “If a mixture containing 3 moles of hydrogen and 1 mole of nitrogen is converted completely in ammonia the ration of initial and final volumes at the same temperature and pressure would be ______________?”
