chemical engineering MCQs – Page 385

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 Review each marked answer and report any item that may be outdated or unclear.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
7681. Which of the following is the costliest method for commercial production of hydrogen for ammonia synthesis ?
comments icon0
A. Electrolysis of water

B. Steam reforming of naphtha

C. H2 separation from coke oven gas

D. Cracking of natural gas

7682. Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of________________?
comments icon0

A. SO2

B. Hydrocarbons

C. CO2

D. CFC (chloro fluoro carbon)
7683. The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?
comments icon0

A. 20

B. 750

C. 1500

D. 230
7684. ______________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant ?
comments icon0

A. Phosphorous

B. Fluorine

C. Sulphur

D. Calcium

7685. Montecatini process is used for the manufacture of____________________?
comments icon0

A. Phosphoric acid

B. Nitric acid

C. Calcium ammonium nitrate (CAN)

D. Urea
7686. Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?
comments icon0

A. Improving the strength & heat resistance

B. All A, B & C

C. Increasing the effectiveness

D. Stabilisation

7687. Workers working in _______________ industry are most prone to white lung cancer?
comments icon0
A. Textile

B. Coal mining

C. Limestone mining

D. Asbestos

7688. Color of nitric acid is light yellow due to the presence of__________________?
comments icon0
A. NO2

B. N2H5

C. NH3

D. NO

7689. High noise levels produced during operation of fans and compressors can be reduced by using__________________?
comments icon0

A. Acoustic absorbent

B. None of these

C. Lagging of noisy duct

D. Mufflers (silencers)
7690. Ammonium nitrate is___________________?
comments icon0
A. Mixed with limestone powder to reduce its explosive nature before using it as a fertilizer

B. Having about 40% N2

C. Not prone to explosive thermal decomposition

D. Not hygroscopic

7691. Dehydration of ammonium carbamate (to produce urea) is a/an _____________ reaction?
comments icon0
A. Endothermic

B. Exothermic

C. Reversible

D. Catalytic

7692. On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because __________________?
comments icon0

A. Of jamming of respiratory tract

B. Of clotting of blood

C. It forms CO2 by combining with oxygen present in the blood

D. apable of absorbing oxygen</strong>

E. It forms carboxyhemoglobin by combining with haemoglobin of blood, thereby making it
7693. Ammonia synthesis gas is produced from natural gas by___________________?
comments icon0

A. Partial oxidation

B. Steam reforming

C. Hydrogenation

D. Thermal cracking

7694. Catalyst used in the manufacture of NH3 by Habers process is finely divided________________?
comments icon0
A. Iron

B. Nickel

C. Alumina

D. Vanadium pentoxide

7695. Fertiliser value of a nitrogenous fertiliser is expressed in terms of its ______________ content?
comments icon0
A. N2

B. NHO3

C. KNO3

D. NO2

7696. Heating a mixture of phosphate rock, coke and sand in an electric furnace produces___________________?
comments icon0
A. Phosphorous

B. Superphosphate

C. Ammonium phosphate

D. Phosphoric acid

7697. Oxidation of ammonia is________________?
comments icon0

A. Non-catalytic

B. Autocatalytic

C. Endothermic

D. Exothermic
7698. With increases in pressure, the conversion of Ammonium carbamate into urea___________________?
comments icon0

A. Remains unaltered

B. Increases

C. Can either increase or decrease depends on biuret content

D. Decreases

7699. Out of the following, N2 content is minimum in_____________________?
comments icon0

A. Urea

B. Ammonium nitrate

C. Ammonium sulphate

D. Ammonium chloride

7700. Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600C, the percentage stack loss will be maximum in case of complete combustion of_________________?
comments icon0

A. Blast furnace gas with oxygen

B. Blast furnace gas with air

C. Furnace oil with oxygen

D. Furnace oil with air