chemical engineering Mcqs
7601. _____________ is the undesirable by-product produced in the manufacture of urea ?
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A. Ammonium carbonate

B. Carbon dioxide

C. Biuret

D. Ammonium carbamate

7602. _____________ is not a fertiliser?
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A. Ferrous sulphate

B. Calcium ammonium nitrate

C. Liquid ammonia

D. Ammonium sulphate

7603. Montecatini process is a widely used process for the manufacture of ___________________?
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A. Urea

B. Triple superphosphate

C. Calcium ammonium nitrate

D. None of these

7604. Triple superphosphate is made by reacting phosphate rock with _____________ acid?
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A. Hydrochloric

B. Nitric

C. Sulphuric

D. Phosphoric
7605. Ammonia synthesis gas is produced from fuel oil by _________________?
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A. Hydro-cracking

B. Steam reforming

C. Partial oxidation

D. Hydrogenation

7606. Multistage operation (as in the case of catalytic oxidation of SO2) is not carried out for NH3 synthesis, because of____________________?
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A. Higher pumping cost

B. High cost of the high pressure vessel used for the reactor

C. Chances of entrainment and disturbance of catalyst bed

D. Comparatively higher pressure drop

7607. Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is___________________?
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A. Exothermic

B. Endothermic

C. None of these

D. Autocatalytic

7608. -10-5 fertilisers mean that they contain______________?
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A. Only 5 to 10% active fertiliser constituents

B. 5, 10, 5% respectively of N2, P2O5 and K2O
7609. Salt content in sea water is about ______________ percent?
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A. 9.05

B. 1

C. 0.5

D. 3.5
7610. Which of the following gasifiers can be attached to coal based fertiliser plants ?
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A. Gasifier working at 20 atm

B. Gasifier working at 40 atm

C. Kopper-Totzek gasifier

D. Lurgi (high pressure) gasifier

7611. The upper layer of atmosphere is called the ____________________?
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A. Ionosphere

B. Troposphere

C. Stratosphere

D. None of these

7612. Which is the most suitable fertiliser for paddy ?
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A. Ammonium nitrate

B. CAN

C. Superphosphate

D. Ammonium sulphate
7613. Fertiliser produced during soda ash manufacture by dual process is ammonium______________________?
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A. Nitrate

B. Sulphate

C. Chloride

D. None of these

7614. Dehydration of ammonium carbamate produces__________________?
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A. Biuret

B. Ammonia water

C. Urea

D. None of these

7615. Though kinetics of ammonia synthesis dictates the use of low temperature for high equilibrium conversion, yet it is kept moderately high (550C), because at low temperature___________________?
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A. Very high pressure is required resulting in costly pressure vessel

B. Space velocity of gas is very low resulting in decreased conversion

C. None of these

D. Rate of reaction is very low
7616. In water treatment plant, zeolite process is used to remove the _____________ of water?
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A. Iron & zinc

B. Alkalinity

C. Hardness

D. Acidity

7617. Nitrogen content in ammonium sulphate (a fertiliser) is around ______________ percent?
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A. 50

B. 20

C. 65

D. 5

7618. P2O5 percentage in the phosphoric acid produced by wet process is about_________________?
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A. 70

B. 30

C. 50

D. 10

7619. Superphosphate is manufactured by reacting phosphate rock with_____________________?
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A. Aluminium chloride

B. None of these

C. Sulphuric acid

D. Acetic acid

7620. Reaction of ortho-phosphoric acid with phosphate rock produces _________________?
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A. Meta-phosphoric acid

B. Superphosphate

C. Triple superphosphate

D. Monoammonium phosphate

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

7641. NPK means a ______________ fertiliser?
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A. Liquid

B. Mixed

C. Solid

D. Potassic

7642. Conditioners like finely divided peat are added to the fertiliser to________________?
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A. Produce bulk

B. Increase its solubility

C. Counteract burning

D. Avoid caking & hardening
7643. Which of the following is a manmade source of air pollution ?
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A. Automobile exhaust

B. Bacterial action in soil and swamp areas

C. Forest fire

D. All A., B. and C.

7644. In ammonia synthesis (N2 + 3H2 = 2NH3), there is a decrease in total volume, hence to get high equilibrium conversion, the reaction should be carried out at________________?
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A. High pressure

B. Very high temperature

C. Low pressure

D. Atmospheric pressure; as the pressure has no effect on conversion

7645. ______________ is the most suitable fertiliser for paddy?
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A. Potassium nitrate

B. Ammonium sulphate

C. Urea

D. Superphosphate

7646. CO2 present in reformed gas (obtained by steam reforming of naphtha) is removed by absorbing in _________________?
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A. Mono-ethanolamine (MEA)

B. Methyl-Ethyl Ketone (MEK)

C. Ammoniacal liquor

D. Slaked lime

7647. Which of the following is not a mixed fertiliser ?
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A. None of these

B. Nitrophosphate

C. Calcium ammonium nitrate (CAN)

D. Ammonium phosphate

7648. Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?
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A. 185

B. 105

C. 135

D. 160

7649. Reaction of ______________ acid with phosphate rock produces superphosphates?
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A. Sulphuric

B. Nitric

C. Phosphoric

D. Hydrochloric

7650. Neutralisation of nitric acid with ammonia to produce ammonium nitrate is a/an _______________________ reaction?
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A. Catalytic

B. Exothermic

C. Autocatalytic

D. Endothermic