chemical engineering MCQs – Page 74

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 Review each marked answer and report any item that may be outdated or unclear.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

1461. Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about _____________ percent?
0

A. 75

B. 50

C. < 10

D. > 30

1462. 10% oleum comprises of 10% free_________________?
0

A. H2SO3

B. SO2

C. SO3

D. H2SO4

1463. _________________ is not a constituent of gun powder?
0

A. Charcoal

B. Sulphur

C. Carbon

D. Potassium nitrate

1464. Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at __________________?
0

A. 1 atm & 100C

B. 5 atm & 275C

C. 50 atm & 1000C

D. 100 atm & 500C

1465. Pick out the wrong statement?
0

A. Gypsum is added to Portland cement to lengthen its setting time

B. None of these

C. Dry process is used for the manufacture of cement, when the raw material is blast furnace slag

D. Portland cement is made employing wet process

1466. Producer gas consists mainly of________________________?
0

A. CO, H2

B. H2, CH4

C. CO, CO2 N2, H2

D. C2H2, CO2, H2

1467. The type of high refractive index glass used in optical instruments is _____________ glass?
0

A. Flint

B. Pyrex

C. Crookes

D. None of these

1468. Sodium chloride content in sea water is about _______________ gms/liter?
0

A. 10

B. 25

C. 50

D. 2

1469. High temperature carbonisation of coal produces _____________________ ?
0

A. Less of gases compared to liquid products

B. None of these

C. Larger quantity of tar compared to low temperature carbonisation

D. Inferior coke compared to low temperature carbonisation

1470. Chloral is used in the manufacture of__________________?
0

A. Parathion

B. BHC

C. None of these

D. DDT

1471. The combustion reaction, C + O2 = CO2, is__________________?
0

A. Exothermic

B. Autocatalytic

C. None of these

D. Endothermic

1472. Dry ice (solidified CO2) is used for the___________________?
0

A. Liquefaction of natural gas

B. None of these

C. Liquefaction of permanent gases

D. Storage & shipment of frozen foods and ice-creams

1473. Massecuite is a terminology used in the ______________ industry ?
0

A. Soap

B. Paint

C. Sugar

D. Oil hydrogenation

1474. Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of_________________?
0

A. Molasses

B. Tannin

C. Carbohydrate

D. Collagen

1475. Tall oil obtained as a by-product from the black liquor recovery is________________?
0

A. All A , B. & C.

B. Used in the manufacture of greases, emulsions & soaps

C. Composed mainly of rosin & fatty acids

D. A black, sticky & viscous liquid

1476. Fusel oil is a/an_________________?
0

A. Extract from medicinal herbs

B. ohol from molasses)</strong>

C. Essential oil

D. None of these

E. Mixture of higher molecular weight alcohols (a by-product obtained during production of

1477. Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?
0

A. Reduction

B. Smelting

C. Calcination

D. Roasting

1478. Conversion of SO2 to SO3 in Monsanto 4-pass converter is about ____________________ percent?
0

A. 90

B. 80

C. 98

D. 100

1479. Pick out the wrong statement pertaining to the soap manufacture?
0

A. Transparent soaps are made by cold process

B. Organic pigments are used as colouring materials in the soap manufacture

C. Both laundry as well as toilet soaps are manufactured by hot process

D. Colourless rosin is used in the manufacture of laundry soaps

1480. Cooking liquor in case of sulphite process is _____________________?
0

A. Magnesium sulphite and free SO2 in acid medium

B. Magnesium sulphate and magnesium bicarbonate

C. None of these

D. Sodium sulphite and sodium bisulphite

Previous Next

Showing 1461 to 1480 of 8709 mcqs