chemical engineering MCQs – Page 387

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs
7721. Catalyst used in steam reforming of naphtha is__________________?
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A. Silica gel

B. Rhodium

C. Nickel

D. Platinum

7722. Catalyst used in steam reforming of naphtha is ___________________?
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A. Cobalt

B. Chromium

C. Bauxite

D. Nickel oxide on alumina support
7723. H3PO4 is the chemical formula of ______________ phosphoric acid?
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A. Meta

B. Pyro

C. Ortho

D. None of these

7724. Bio-fertilisers are cheaper, renewable and pollution free. They improve the _____________ of the soil?
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A. All A., B. and C.

B. Nutrient supply

C. Texture

D. Water holding capacity

7725. Pick out the wrong statement ?
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A. High concentration of oxygen in flue gas means high stack loss

B. Gaseous fuels require the least % excess air for complete combustion

C. The ratio of fixed carbon to volatile matter percentage in coal is called its fuel ratio

D. Calorific value of natural gas is more than that of LPG
7726. Steam reforming of naphtha produces ammonia synthesis gas. This is a/an ____________ process?
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A. Autocatalytic

B. Endothermic

C. Non-catalytic

D. Exothermic

7727. A fertiliser plant is classified as a gas based fertiliser plant, when it uses ______________ gas as a source of hydrogen for the manufacture of ammonia?
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A. Natural

B. Producer

C. Coke oven

D. Coal

7728. A Potassic fertiliser contains 50% K2O. It could be _________________?
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A. None of these

B. Potassium chloride

C. Potassium sulphate

D. A mixture of NaCl + KCl

7729. Which of the following does not come under the category of secondary nutrient for plant growth ?
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A. Oxygen

B. Magnesium

C. Sulphur

D. Calcium

7730. Pick out the correct statement?
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A. Reaction of NH3 with HNO3 to produce (NH4)2NO3 is endothermic

B. With increase in NH3/CO2 ratio, urea yield decreases for a given temperature, pressure and

C. al feed rate</strong>

D. Biuret (an intermediate during urea manufacture) is toxic to seeds and animals

E. Both B. and C.

7731. During conversion of ammonium carbamate into urea, presence of large excess of water______________?
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A. Adversely affects the yield of urea

B. Reduces the evaporator load by diluting the urea solution

C. Increases the yield of urea

D. Does not affect the yield of urea

7732. Reaction of ortho-phosphoric acid with soda ash produces______________?
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A. Tributyl phosphate

B. Tricresyl phosphate

C. Sodium Tributyl phosphate (STPP)

D. Nitrophosphate

7733. Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?
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A. Ozone and iodine

B. Ultraviolet light for irradiation of water

C. Chlorine or its compounds

D. All A., B. & C.
7734. Nitrolime is___________________?
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A. Calcium ammonium nitrate

B. A mixture of ammonium nitrate and calcium nitrate

C. A mixture of nitric acid and lime

D. Calcium nitrate

7735. Reaction of Cresylic acid with _____________ produces Tricresyl phosphate?
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A. Phosphorous pentoxide

B. Calcium phosphate

C. Ammonium phosphate

D. Phosphorous oxychloride
7736. Which of the following set of conditions is favourable for the maximum yield of ammonia by Habers process ?
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A. High pressure, high reactants concentration, low temperature

B. High pressure, low reactants concentration, high temperature

C. Low pressure, high reactants concentration, low temperature

D. High pressure, low reactants concentration, low temperature

7737. An increase in the NH3/CO2 ratio in urea manufacture results in__________________?
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A. Decreased yield of urea

B. Increased degree of conversion of CO2 to urea

C. Decreased degree of conversion of NH3 to urea

D. Decreased specific volume of molten mass

7738. Which of the following is not an additive for flue gases from furnace to reduce its dewpoint ?
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A. None of these

B. Ammonia

C. Fine dolomite

D. Alkaline powders

7739. Ammonium nitrate (a fertiliser) is coated with limestone powder to ____________________?
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A. Increase its nitrogen content

B. Add extra nutrient as fertiliser

C. Avoid the risk of explosion

D. Cut down its production cost

7740. Which fertiliser is made (using coke oven gas) in by products plant of an integrated steel plant ?
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A. Urea

B. Superphosphate

C. CAN

D. Ammonium sulphate