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Quiz 2
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Q.1
Chemical formula of biuret is
NH₂.CO.NH₂
NH₃.COO.NH₃
NH₂CONHCONH₂
NH₄COONH₂
Q.2
In ammonia synthesis (N₂ + 3H₂ = 2NH₃), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at
Low pressure
High pressure
Very high temperature
Atmospheric pressure; as the pressure has no effect on conversion
Q.3
Which of the following is the costliest source of hydrogen needed for ammonia manufacture under Indian condition?
Electrolysis of water
Cryogenic removal of H₂ from coke oven gas
Steam reforming of naphtha
Natural gas cracking
Q.4
Ammonia synthesis reaction is
Exothermic
Endothermic
Autocatalytic
None of these
Q.5
Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an __________ reaction.
Catalytic
Endothermic
Exothermic
Autocatalytic
Q.6
Action of phosphoric acid on rock phosphate produces
Superphosphate
Triple superphosphate
Nitrophosphate
Diammonium phosphate
Q.7
Calcium ammonium nitrate (CAN) is
A mixed fertiliser
A straight fertiliser
A complex fertiliser
Not a fertiliser ; it is an explosive
Q.8
P₂O₅ content in triple superphosphate is about __________ percent.
42-50
15-20
85-90
70-75
Q.9
Yield of elemental phosphorous from rock phosphate is about __________ percent.
1-2
15-25
40-45
60-65
Q.10
P₂O₅ content in superphosphate is about __________ percent.
30-35
15-20
65-70
85-90
Q.11
CaH₄(PO₄)₂ is the chemical formula of
Superphosphate
Triple superphosphate
Calcium phosphate
Meta phosphoric acid
Q.12
Pick out the wrong statement.
Loamy soil is the best soil for vigorous plant growth, while the clayey soil is solid and hence the plant roots penetrate with difficulty
Large excess use of nitrogenous fertiliser in land causes the problem of diarrhoea and cyanosis
Application of large excess of potassic fertiliser in soil increases the valuable carotene in fruits and vegetables
Cereal crops grown on alkaline soil absorb higher amount of flourides thereby spreading flourosis
Q.13
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.
Increased biuret formation
High corrosion rate
Increased cost of equipment
All of the above
Q.14
Conversion of yellow phosphorous to red phosphorous is done by heating it in covered retorts at __________ °C in absence of air.
50-80
250-400
1000-1200
800-900
Q.15
Ammonium nitrate is
Having about 40% N₂
Not hygroscopic
Not prone to explosive thermal decomposition
Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer
Q.16
Fertiliser plants get their N₂ requirements
By fractionation of liquified air
By dissociating oxides of nitrogen
From coal gas (coke oven gas)
From producer gas
Q.17
Electric process as compared to wet process (for the manufacture of phosphoric acid)
Can use only high grade phosphate rock
Is used less frequently
Produces a valuable by-product called gypsum
Is weak acid process
Q.18
Which of the following gasifiers can be attached to coal based fertiliser plants?
Lurgi (high pressure) gasifier
Kopper-Totzek gasifier
Gasifier working at 20 atm
Gasifier working at 40 atm
Q.19
In an ammonia plant, the purge off is essential to
Maintain inert gas concentration within a limit
Remove excess poisonous gases
Maintain H₂ : N₂ ratio at 3 :1
Remove uncondensed ammonia vapour
Q.20
Which of the following is not a measure component necessarily to be present in fertilisers?
Nitrogen
Potassium
Phosphorous
Sulphur
Q.21
Color of nitric acid is light yellow due to the presence of
NO
NO₂
N₂H₅
NH₃
Q.22
Triple superphosphate is chemically represented as
CaF₂.3Ca₃(PO₄)₂
3Ca₃(PO₄)₂
Ca(PO₃)₂
Ca(H₂PO₄)₂
Q.23
Tricresyl phosphate is chemically represented as
(CH₃ C₆ H₄)₃ PO₄
Ca₁₀(PO₄)3F₆
(NH₄)₂HPO₄
NH₄H₂PO₄
Q.24
Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.
Exothermic
Endothermic
Autocatalytic
Catalytic
Q.25
Nitrogen content of urea is about __________ percent.
10
46
80
94
Q.26
Leaching of phosphate rock by strong __________ acid produces phosphoric acid.
Sulphuric
Hydrochloric
Either A or B
Neither A nor B
Q.27
__________ is not a fertiliser.
Calcium ammonium nitrate
Ferrous sulphate
Liquid ammonia
Ammonium sulphate
Q.28
Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.
Catalytic
Exothermic
Endothermic
Reversible
Q.29
Conditioners like finely divided peat are added to the fertiliser to
Counteract burning
Avoid caking & hardening
Produce bulk
Increase its solubility
Q.30
Reaction of cresylic acid with __________ produces tricresyl phosphate.
Phosphorous pentoxide
Phosphorous oxychloride
Ammonium phosphate
Calcium phosphate
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