chemical engineering MCQs – Page 54

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 Review each marked answer and report any item that may be outdated or unclear.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
1061. ______________ Nature of hypo (sodium thiosulphate) makes it useful in photography ?
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A. Oxidising

B. Complex forming

C. Photochemical

D. Reducing

1062. Oleum produces fumes of_____________________?
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A. SO2 + H2SO4

B. SO3

C. H2SO4

D. SO2

1063. ______________ is obtained as a by-product in the manufacture of sodium hydroxide using brine ?
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A. Sodium carbonate

B. Chlorine

C. Ammonium chloride

D. Sodium bi-carbonate

1064. The chamber process is______________________?
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A. None of these

B. A batch process for directly producing high strength (98 to 100%) H2SO4

C. Non-catalytic and operates only on pyrites

D. Preferred over contact process for producing 98 to 100% H2SO4 and various oleums

1065. Builders are added in soap to act as___________________?
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A. Corrosion inhibitor

B. Fabric brightener

C. Cleaning power booster

D. Anti-redeposition agent

1066. Graphite is a/an________________________?
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A. Electrical insulator

B. Allotrope of carbon

C. Moderator used in nuclear reactor

D. Both B. and C.
1067. Percentage of glycerine present in the spent lye obtained during soap manufacture is about________________?
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A. 5

B. 35

C. 20

D. 0.5

1068. Which is the main reducing agent during production of iron from iron ore in a blast furnace ?
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A. C

B. CO2

C. CO

D. H2

1069. Catalyst used during the manufacture of Vanaspati Ghee is ___________________?
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A. Nickel

B. Platinum

C. Zinc

D. Copper

1070. Which is the most suitable dye for synthetic fibres ?
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A. Pigment dye

B. Mordant dye

C. Azoic dye

D. Acid dye
1071. Which of the following fuel gases contains maximum amount of carbon monoxide ?
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A. Coke oven gas

B. Water gas

C. Blast furnace gas

D. L.D. converter gas
1072. Phosphoric acid is prepared from_____________________?
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A. None of these

B. Cryolite

C. Chalcopyrite

D. Rock phosphate
1073. High temperature carbonisation of coal takes place at __________________ C?
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A. 700

B. 2000

C. < 500

D. 1100
1074. ______________ glass has the lowest co-efficient of thermal expansion and hence is more heat resistant ?
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A. Lead

B. Pyrex

C. Soda lime

D. High silica

1075. Teflon is___________________?
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A. An inorganic polymer

B. A monomer

C. Phenol formaldehyde

D. Poly tetra-fluoro-ethylene (P.T.F.E.)
1076. Sizing material is incorporated in paper to___________________?
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A. Increase its thickness

B. Increase its flexibility & opacity

C. Impart resistance to penetration by liquids

D. Increase its brightness

1077. White phosphorous is stored under water, because __________________?
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A. It is poisonous

B. It does not react with water

C. Its kindling temperature in dry air is very low

D. It is unstable

1078. Chemical formula of oleum is_________________?
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A. H2SO4

B. H2SO7

C. H2SO3

D. H2S2O7
1079. In Kraft process of paper manufacture, white cooking liquor consists of caustic soda________________?
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A. Sodium sulphite & sodium carbonate

B. None of these

C. Sodium sulphide & sodium carbonate

D. Sodium sulphite & sodium sulphide

1080. P.T.F.E. (Poly tetra fluoro ethylene) is commercially known as____________________?
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A. Nylon-66

B. Bakelite

C. Neoprene

D. Teflon