Rajasthan Polytechnic Third Year Paper 2016 – Cement and Fertiliser Technology

Rajasthan Polytechnic Third Year Paper 2016 – Cement and Fertiliser Technology

Common fertilizers are available in the following form
(a) Power
(b) Granules
(c) Lumps
(d) Flakes

Ammonia synthesis gas is produced from natural gas by
(a) Thermal cracking
(b) Steam reforming
(c) Partial oxidation
(d) Hydrogenation

Why ammonium nitrate (a fertilizer) is coated with limestone powder?
(a) Increase its nitrogen content
(b) Cut down it’s production cost
(c) Avoid risk of explosion
(d) Add extra nutrient as fertiliser

Action of phosphoric acid on rock phosphate produces
(a) Super phosphate
(b) Triple super phosphate
(c) Nitro Phosphate
(d) Diammonium phosphate

Liquid ammonia is not used as such a fertiliser in tropical countries like India, because
(a) It’s N2 content is very low
(b) It is very costly
(c) It will evaporate on spraying
(d) It is not available

Lower temperature and large excess of ammonia in urea melt
(a) increase biuret formation
(b) decreases biuret formation
(c) is undesirable
(d) does not effect biuret formation

Superphosphate is manufactured by the reacting phosphate rock with
(a) Sulphuric acid
(b) Acetic acid
(c) Aluminium chloride
(d) None of these

Prilling tower is found in the flow sheet for the manufacture of
(a) Ammonia
(b) Triple super phosphate
(c) Super phosphate
(d) Urea

Dehydration of ammonium carbonate (to produce urea) is following reaction
(a) Reversible
(b) Catalytic
(c) Exothermic
(d) Endothermic

Ammonium sulphate can be produced by reacting gypsum with
(a) Ammonia
(b) Ammonium carbonate
(c) Nitric acid
(d) None of these