chemical engineering MCQs – Page 382

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 Review each marked answer and report any item that may be outdated or unclear.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

7621. Raw materials required for the production of CAN (Calcium ammonium nitrate) is NH3__________________?
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A. CO2 & H2SO4

B. HNO3 & NH4Cl

C. HNO3 & limestone

D. CO2 & KNO3

7622. Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450C in the ___________________?
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A. Absence of air

B. Presence of an oxidising atmosphere

C. Presence of an inert atmosphere

D. Presence of a reducing atmosphere

7623. Heating of ortho-phosphoric acid to 250C produces___________________?
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A. No change in it

B. Pyrophosphoric acid

C. None of these

D. Meta-phosphoric acid

7624. The main constituent of rock phosphate is _____________________?
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A. Mono-calcium phosphate

B. Fluorspar

C. Di-calcium phosphate

D. None of these

7625. Nitrogen content of a nitrogenous fertiliser is 35%. It could be___________________?
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A. Ammonium nitrate

B. Calcium ammonium nitrate (CAN)

C. Urea

D. Ammonium sulphate

7626. CaH4(PO4)2 is the chemical formula of ___________________?
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A. Triple superphosphate

B. Superphosphate

C. Meta phosphoric acid

D. Calcium phosphate

7627. Catalyst used in the oxidation of ammonia is ________________?
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A. Cobalt-molybdenum

B. Platinum-beryllium

C. Platinum-rhodium

D. Platinum-molybdenum

7628. Which of the following is not a weightless pollutant ?
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A. Thermal pollution

B. Noise pollution

C. SPM

D. Radioactive rays

7629. Overfire burning in a furnace is a phenomenon characterised by____________________?
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A. None of these

B. Burning carbon monoxide and other incombustible in upper zone of furnace by supplying

C. Supply of excess air

D. e air</strong>

E. Supply of excess fuel

7630. Urea is a better fertilizer than ammonium sulphate, because__________________?
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A. It is not poisonous

B. It is cheaper

C. Nitrogen content is higher

D. It is easy to manufacture

7631. The term Biological Oxygen Demand (BOD) is used in relation to ______________________?
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A. Distilled water

B. Industrial effluents

C. Potable water

D. Cooling water

7632. Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by _____________________?
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A. Floatation & skimming

B. Centrifugation

C. Chemical coagulation

D. Ultra filtration

7633. Which is a catalyst promoter used in catalytic ammonia synthesis reaction ?
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A. Cr2O3

B. Al2O3

C. MnO

D. K2O

7634. Noise level in a quiet private business office is about _____________ decibels?
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A. 50

B. 70

C. 25

D. 85

7635. Which of the following fertilisers is required for the development of fibrous materials of the plants and of the sugar of vegetable & fruits ?
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A. None of these

B. Potassic fertiliser

C. Nitrogenous fertilisers

D. Phosphatic fertilisers

7636. Two gas based fertiliser plants are located in India are_________________?
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A. Maharashtra and Gujarat

B. Gujarat and Madhya Pradesh

C. Jharkhand and Chhattisgarh

D. Maharashtra and Orissa

7637. In _____________ converter for ammonia synthesis, the catalyst is arranged in the form of a single continuous bed?
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A. Claude

B. Uhde

C. Kellogg

D. Fauser-Montecatini

7638. Rock phosphate constitutes mainly of___________________?
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A. Di-calcium phosphate

B. Di-ammonium phosphate

C. Mono-calcium phosphate

D. Fluorapatite

7639. Ammonia synthesis reaction is______________________?
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A. Exothermic

B. Autocatalytic

C. None of these

D. Endothermic

7640. Dehydration of ammonium carbamate to yield urea is a/an __________________ reaction?
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A. Endothermic

B. Catalytic

C. Autocatalytic

D. Exothermic

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