All Free Chemical Engineering MCQs with Answers
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6,983 questions · page 46 of 350
- A. A mixture of Na2CO3 and As2O3
- B. K2SO4
- C. A mixture of K2CO3 and As2O3
- D. Na2SO4
Explanation: Vetrocoke liquor is an alkaline potassium carbonate solution promoted with arsenic oxide, represented as a mixture of K2CO3 and As2O3.
Correct answer: A mixture of K2CO3 and As2O3- A. Claude
- B. Fauser-Montecatini
- C. Uhde
- D. Kellogg
Explanation: The Claude ammonia converter uses its catalyst as one continuous bed. Other listed converter designs commonly divide the catalyst into…
Correct answer: Claude- A. Calcium nitrate
- B. Urea
- C. Calcium ammonium nitrate (CAN)
- D. Ammonium sulphate
Explanation: Urea contains about 46% nitrogen, higher than calcium nitrate, CAN, or ammonium sulphate.
Correct answer: Urea- A. Acetic acid
- B. Aluminium chloride
- C. Sulphuric acid
- D. None of these
Explanation: Sulfuric acid acidulates phosphate rock to produce single superphosphate, containing monocalcium phosphate and gypsum.
Correct answer: Sulphuric acid- A. Steam reforming
- B. Thermal cracking
- C. Partial oxidation
- D. Hydrogenation
Explanation: Natural gas, mainly methane, reacts with steam over a catalyst to form hydrogen and carbon monoxide, followed by shift conversion to…
Correct answer: Steam reforming- A. NH2.CO.NH2
- B. NH2CONHCONH2
- C. NH3.COO.NH3
- D. NH4COONH2
Explanation: Biuret forms when two urea units condense with loss of ammonia, giving the structure NH2CONHCONH2.
Correct answer: NH2CONHCONH2- A. Meta-phosphoric acid
- B. None of these
- C. No change in it
- D. Pyrophosphoric acid
Explanation: On heating, two molecules of orthophosphoric acid condense with loss of water to form pyrophosphoric acid, H4P2O7.
Correct answer: Pyrophosphoric acid- A. Stems & leaves during early stage of plant growth
- B. Starches of potatoes & grains
- C. Sugar of fruits & vegetables
- D. Fibrous materials of plants
Explanation: Potassium supports starch formation, sugar production and fibre development, but early stem and leaf growth is mainly promoted by…
Correct answer: Stems & leaves during early stage of plant growth- A. 43% N2 and 13% P2O5
- B. 13% N2 and 43% P2O5
- C. 43% N2 and 13% K2O
- D. 43% K2O and 43% P2O5
Explanation: A base suspension fertiliser is commonly specified approximately as 13% nitrogen and 43% P2O5.
Correct answer: 13% N2 and 43% P2O5910. Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content?
- A. NO2
- B. KNO3
- C. N2
- D. NHO3
Explanation: The nitrogen value of a fertiliser is conventionally reported as the equivalent percentage of nitrogen, written here as N2 in the options.
Correct answer: N2- A. 25-28
- B. > 98
- C. 75-80
- D. 52-54
Explanation: Triple superphosphate is made by reacting phosphate rock with relatively concentrated orthophosphoric acid, commonly about 52 to 54%.
Correct answer: 52-54- A. Stengel
- B. Haber's
- C. Le-chatelier's
- D. Du-pont's
Explanation: The Stengel process produces ammonium nitrate by reacting ammonia with nitric acid in the vapour phase.
Correct answer: Stengel- A. Catalytic
- B. Endothermic
- C. Exothermic
- D. Autocatalytic
Explanation: Ammonia neutralisation with nitric acid releases substantial heat because ammonium nitrate and water form from the acid-base reaction.
Correct answer: Exothermic- A. None of these
- B. Superphosphate
- C. White phosphorous
- D. Ortho-phosphoric acid
Explanation: Concentrated sulphuric acid attacks phosphate rock in the wet process, producing ortho-phosphoric acid along with calcium sulphate.
Correct answer: Ortho-phosphoric acid- A. Calcium nitrate
- B. Ammonium nitrate
- C. None of these
- D. Calcium ammonium nitrate (CAN)
Explanation: Nitrolime is calcium ammonium nitrate, commonly abbreviated CAN, and is made by combining ammonium nitrate with a limestone or dolomite…
Correct answer: Calcium ammonium nitrate (CAN)- A. Ortho
- B. Pyro
- C. Meta
- D. None of these
Explanation: H3PO4 is ortho-phosphoric acid, the normal and most stable form of phosphoric acid.
Correct answer: Ortho- A. Platinum-beryllium
- B. Cobalt-molybdenum
- C. Platinum-rhodium
- D. Platinum-molybdenum
Explanation: Ammonia is oxidised to nitric oxide in the Ostwald process over a platinum-rhodium gauze catalyst.
Correct answer: Platinum-rhodium918. Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant ?
- A. Urea
- B. CAN
- C. Superphosphate
- D. Ammonium sulphate
Explanation: Coke-oven gas contains ammonia, which can be recovered by absorption in sulphuric acid to produce ammonium sulphate.
Correct answer: Ammonium sulphate- A. Ammonium carbamate
- B. Biuret
- C. Ammonium carbonate
- D. None of these
Explanation: Urea manufacture first forms ammonium carbamate from ammonia and carbon dioxide, which then dehydrates to urea and water.
Correct answer: Ammonium carbamate- A. Nickel
- B. Reduced iron oxide
- C. Vanadium pentoxide
- D. Silica gel
Explanation: The Haber process uses an iron catalyst, generally prepared by reducing promoted magnetite or iron oxide to active iron.
Correct answer: Reduced iron oxide