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Home » Engineering » Chemical Engineering » Aptitude Test - 25
1.Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ?
A. Urea
B. CAN
C. Ammonium sulphate
D. Urea
2.The most suitable fertiliser for accelerating seeding or fruit formation in later stages of plant growth is ____ fertiliser?
A. Nitrogenous
B. Phosphatic
C. Potassic
D. Nitrogenous
3.Triple superphosphate is made by reacting phosphate rock with _____ acid?
A. Phosphoric
B. Nitric
C. Sulphuric
D. Phosphoric
4._ catalyst is used in the production of urea from CO2 and NH3??
A. Vanadium pentoxide
B. No
C. Alumina
D. Vanadium pentoxide
5.Ammonium nitrate is______?
A. Having about 40% N2
B. Not hygroscopic
C. Not prone to explosive thermal decomposition
D. Having about 40% N2
6.Tricresyl phosphate is chemically represented as___?
A. (CH3 C6 H4)3 PO4
B. Ca10(PO4)3F6
C. (NH4)2HPO4
D. (CH3 C6 H4)3 PO4
7.Nitrolime is_?
A. Calcium nitrate
B. Calcium ammonium nitrate
C. A mixture of nitric acid and lime
D. Calcium nitrate
8.Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of__?
A. Comparatively higher pressure drop
B. High cost of the high pressure vessel used for the reactor
C. Higher pumping cost
D. Comparatively higher pressure drop
9.Steam reforming of naphtha produces ammonia synthesis gas. This is a/an ____ process?
A. Autocatalytic
B. Endothermic
C. Exothermic
D. Autocatalytic
10.Catalyst used in steam reforming of naphtha is_?
A. Nickel
B. Platinum
C. Silica gel
D. Nickel
11.Color of nitric acid is light yellow due to the presence of?
A. NO
B. NO2
C. N2H5
D. NO
12.Which of the following is not a commercially used feed-stock for the production of ammonia synthesis gas ?
A. Water
B. Naphtha
C. Tar
D. Water
13.Conditioners like finely divided peat are added to the fertiliser to_?
A. Counteract burning
B. Avoid caking & hardening
C. Produce bulk
D. Counteract burning
14.Urea is a better fertilizer than ammonium sulphate, because?
A. It is cheaper
B. Nitrogen content is higher
C. It is not poisonous
D. It is cheaper
15.Electric furnace method for production of phosphorous uses phosphate rock and ?
A. Phosphoric acid
B. Coke
C. Sulphuric acid
D. Phosphoric acid
16.An increase in the NH3/CO2 ratio in urea manufacture results in?
A. Increased degree of conversion of CO2 to urea
B. Decreased degree of conversion of NH3 to urea
C. Decreased yield of urea
D. Increased degree of conversion of CO2 to urea
17.Maximum nitrogen percentage is in_____?
A. Ammonium sulphate
B. Calcium ammonium nitrate
C. Urea
D. Ammonium sulphate
18.Fertiliser plants get their N2 requirements ?
A. By fractionation of liquefied air
B. By dissociating oxides of nitrogen
C. From coal gas (coke oven gas)
D. By fractionation of liquefied air
19.Which of the following is not a measure component necessarily to be present in fertilisers ?
A. Nitrogen
B. Potassium
C. Phosphorous
D. Nitrogen
20.Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ________ this is normally not done?
A. Increased biuret formation
B. High corrosion rate
C. Increased cost of equipment
D. Increased biuret formation
21.The concentration (weight %) of nitric acid produced by the oxidation of ammonia and absorption of nitrogen oxides with water is about ______ percent?
A. 60
B. 30
C. 95
D. 60
22.Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of__?
A. Phosphoric acid
B. Superphosphate
C. Phosphorous
D. Phosphoric acid
23.Lower temperature and large excess of ammonia in urea melt?
A. Increases biuret formation
B. Decreases biuret formation
C. Is undesirable
D. Increases biuret formation
24.Bio-fertilisers are cheaper, renewable and pollution free. They improve the _______ of the soil?
A. Nutrient supply
B. Texture
C. Water holding capacity
D. Nutrient supply
25.Montecatini process is used for the manufacture of____________________?
A. Nitric acid
B. Phosphoric acid
C. Urea
D. Nitric acid
26.Sodium tri poly phosphate (STPP) is manufactured by reaction of phosphoric acid with sodium___________________?
A. Carbonate
B. Phosphate
C. Bicarbonate
D. Carbonate
27.Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis ?
A. H2 separation from coke oven gas
B. Steam reforming of naphtha
C. Cracking of natural gas
D. H2 separation from coke oven gas
28.Urea is formed only____?
A. In liquid phase
B. In vapour phase
C. At very high temperature
D. In liquid phase
29.A mixture of phosphate rock ______________ is heated in an electric furnace to produce phosphorous?
A. Salt & coke
B. Sand & coke
C. And coke
D. Salt & coke
30.Stoke�s equation is valid in the Reynolds number range__?
A. 0.01 to 0.1
B. 0.1 to 2
C. 2 to 10
D. 0.01 to 0.1
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