Related Questions

During conversion of ammonium carbamate into urea, presence of large excess of water
A Increases the yield of urea
B Adversely affects the yield of urea
C Reduces the evaporator load by diluting the urea solution
D Does not affect the yield of urea
Dehydration of ammonium carbamate (to produce urea) is a/an __________ reaction.
A Reversible
B Catalytic
C Exothermic
D Endothermic
Dehydration of ammonium carbamate to yield urea is a/an __________ reaction.
A Exothermic
B Endothermic
C Autocatalytic
D Catalytic
Dehydration of ammonium carbamate produces
A Urea
B Biuret
C Ammonia water
D None of these
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 easy to manufacture
Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in
A Low bulk density product
B Biuret formation
C Non-spherical prills
D Substantially wet non-flowing and sticky product
Temperature and pressure in urea autoclave is
A 120°C and 300 atm
B 190°C and 200 atm
C 400°C and 550 atm
D 200°C and 10 atm
The composition of fresh feed to the high temperature, high pressure urea autoclave is
A Excess liquid ammonia and liquefied CO2
B Excess liquid ammonia and compressed CO2 gas
C Liquid ammonia and excess compressed CO2
D Compressed ammonia gas and excess compressed CO2
Pick out the wrong conversion formula for the conversion of weight units :
A 1 tonne = 1000 kg = 22.046 lbs
B 1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton
C 1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons
D None of these
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
A Equal to
B Less than
C More than
D None of these

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