chemical engineering MCQs – Page 377

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 Review each marked answer and report any item that may be outdated or unclear.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

7521. Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils ?
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A. Calcium cyanamide

B. Ammonium sulphate

C. Urea

D. CAN

7522. Low grade coal is ______________ to produce ammonia synthesis gas?
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A. Liquefied

B. Gasified

C. Hydrogenated

D. Dehydrogenated

7523. Nitrogenous fertiliser is required__________________?
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A. None of these

B. For accelerating fruit formation in later stage of growth

C. During the early stage of growth to promote development of stem and leaves

D. To lessen the effect of excessive potash application

7524. Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?
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A. Bog iron (iron oxide)

B. Active carbon

C. Pulverised limestone

D. Silica gel

7525. Green house gases blanket/block the infrared radiation from earths surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?
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A. N2

B. CO2

C. H2

D. SO3

7526. Reaction of nitric acid and sulphuric acid with phosphate rock produces_________________?
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A. Diammonium phosphate

B. Tricresyl phosphate

C. Nitrophosphate

D. Tributyl phosphate

7527. Pick out the wrong statement?
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A. A straight fertiliser contains only one nutrient

B. The phosphorous nutrient makes the plant stem stronger and increases its branches

C. Calcium cyanamide is used as weed killer in onion fields

D. All the nitrogenous fertilisers are not soluble in water

7528. The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?
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A. Catalytic conversion

B. Green house effect

C. Global warming

D. Both B. and C.

7529. Nitric acid is produced on commercial scale in a fertiliser plant by___________________?
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A. Passing air through high voltage electric arc

B. None of these

C. Oxidation of ammonia

D. CaNO3 + H2SO4 reaction

7530. Potassic fertiliser is graded based on its ______________ content?
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A. K2O

B. KNO3

C. K2SO4

D. KCl

7531. Potassic fertilisers do not promote the development of ______________________?
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A. Starches of potatoes & grains

B. Stems & leaves during early stage of plant growth

C. Sugar of fruits & vegetables

D. Fibrous materials of plants

7532. For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?
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A. 10000

B. 500

C. 1000

D. 5

7533. Leaching of phosphate rock by strong ____________ acid produces phosphoric acid ?
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A. Hydrochloric

B. Neither A. nor B.

C. Either A. or B.

D. Sulphuric

7534. Global warming may result in __________________?
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A. Decrease in food productivity

B. Cyclone

C. Flood

D. All A., B. and C.

7535. Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of ____________ this is normally not done?
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A. Increased cost of equipment

B. High corrosion rate

C. Increased biuret formation

D. All A., B. & C.

7536. Which of the following fine dust removal equipments is the most efficient ?
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A. Cyclone separator

B. Electrostatic precipitator

C. Scrubber

D. Bag filter

7537. Which of the following furnaces will have maximum thermal efficiency ?
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A. Boiler furnace

B. Soaking pits

C. Walking beam reheating furnace

D. Rotary kilns

7538. Hydrogen content of coke oven gas is ______________ percent?
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A. 84

B. 4

C. 22

D. 58

7539. Catalyst used in ammonia synthesis uses ____________ as a promoter?
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A. Ni

B. Al2O3

C. Pt

D. K2O

7540. Catalyst used in Habers process for ammonia production is_________________?
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A. Nickel

B. Vanadium pentoxide

C. Reduced iron oxide

D. Silica gel

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