chemical engineering chemical process Mcqs
402. Pick out the wrong statement ?
comments icon0
A. None of these

B. Production of cold SBR employs lower pressure as compared to that of hot SBR

C. Cold rubber (SBR) is superior as compared to hot rubber (SBR)

D. Polymerisation temperature can modify the properties of SBR

403. Claude process of gas liquefaction employs___________________?
comments icon0

A. Heat exchange with colder stream

B. Joule-Thomson expansion cooling

C. Adiabatic expansion against a piston or in a turbine

D. Merely compression of gas beyond its critical pressure

404. Glycerine is not used in the____________________?
comments icon0

A. Conditioning and humidification of tobacco

B. Manufacture of pharmaceuticals

C. None of these

D. Manufacture of explosive

405. Coke used for the production of calcium carbide should have____________________?
comments icon0
A. All A , B. and C.

B. Low ash content

C. Low ignition temperature

D. High electrical resistivity

408. Cumene (isopropyl benzene) is made by ____________________?
comments icon0
A. Propylene alkylation of benzene

B. None of these

C. Oxidation of naphthalene

D. Polymerisation of a mixture of benzene & propylene

409. Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the_______________?
comments icon0

A. Synthesis of oleum

B. Fertiliser manufacture

C. Water treatment

D. Car battery solution
410. Unsaturated oils compared to saturated oils have___________________?
comments icon0

A. Higher melting point & lower reactivity to oxygen

B. Lower melting point & lower reactivity to oxygen

C. Higher melting point & higher reactivity to oxygen

D. Lower melting point & higher reactivity to oxygen
412. Wax is a___________________?
comments icon0

A. Mixture of glycerides of fatty acids

B. Mixture of glycerides

C. Mixture of esters of polyhydric alcohols excepting glycerine

D. Liquid at room temperature

413. Lindane is____________________?
comments icon0

A. Not a fumigant

B. BHC (Benzene Hexachloride) containing 99% ?-isomer

C. A by-product of BHC manufacture

D. Both B. and C.

414. Sucrose is a disaccharide consisting of____________________?
comments icon0
A. Glucose and fructose

B. Fructose and galactose

C. Glucose and galactose

D. Glucose and glucose

416. All enzymes are made of______________________?
comments icon0

A. Carbohydrates

B. Amino acids

C. Fats

D. Proteins
420. Liquefaction of gases cannot be done by___________________?
comments icon0

A. Exchange of heat with colder stream

B. Adiabatic expansion against a piston or in a turbine

C. Merely compressing it beyond critical pressure

D. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)

423. Drinking (potable) water treatment does not involve __________________?
comments icon0

A. Coagulation

B. Sedimentation

C. Disinfection

D. Softening
426. Black liquor is converted into white liquor by __________________________?
comments icon0

A. Extractive distillation

B. Multi-effect evaporation only

C. Evaporation and burning the concentrate followed by causticisation of products

D. Selective liquid extraction

427. Bakelite is chemically known as_____________________?
comments icon0
A. Phenol formaldehyde

B. Polyurethane

C. Polyvinyl chloride (PVC)

D. Polybutadiene

428. In industrial nomenclature, alcohol means_________________?
comments icon0

A. Propyl alcohol

B. Butyl alcohol

C. Methyl alcohol

D. Ethanol
430. The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by_________________?
comments icon0

A. None of these

B. Electrolytic reduction

C. Electrolysis

D. Electrolytic oxidation

432. Low purity oxygen is used for____________________?
comments icon0
A. Chemical oxidation processes

B. L.D. steel making

C. Medicinal purposes

D. Cutting and welding of metals

433. Oils are partially hydrogenated (not fully) to manufacture Vanaspati , because fully saturated solidified oils ?
comments icon0

A. Have affinity to retain harmful sulphur compounds

B. Are prone to rancid oxidation

C. Cause cholesterol build up and blood clotting

D. Always contain some amount of nickel (as their complete removal is very difficult)

435. Pick out the wrong statement ?
comments icon0
A. Acetylene gas cannot be used for illumination purpose

B. Strongly caking coal should not be used in the Lurgi gasifier

C. Water gas is called blue gas because of the color of the flame, when it is burnt

D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels

436. Fats as compared to oils have ___________________?
comments icon0

A. Much higher reactivity to oxygen

B. Less unsaturated glycerides of fatty acids

C. More unsaturated glycerides of fatty acids

D. Lower melting point

437. Saponification number of an oil or fat____________________?
comments icon0

A. Gives an idea about its molecular weight

B. Detects its adulteration

C. All A , B. & C.

D. Is inversely proportional to its molecular weight

439. Pick out the wrong statement ?
comments icon0

A. Protein catalysts are called enzymes

B. Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye

C. pectively

D. The rate of chemical reaction is independent of the concentration of reactants at high

E. centration of enzymes

F. Total sugar content in molasses is about 10%
440. Fumigant insecticides___________________?
comments icon0

A. Emit poisonous vapour

B. None of these

C. Are absorbed throughout the plant

D. Kill insects, when they eat it

441. Concentration of sulphide ores is done usually by____________________?
comments icon0
A. Froth floatation

B. Roasting

C. Electromagnetic separation

D. Smelting

442. Gun powder uses_____________________?
comments icon0

A. Potassium nitrate

B. Sulphur

C. Charcoal

D. All A , B, & C.
443. Which of the following is not an abrasive material ?
comments icon0

A. Pumice

B. Carborundum

C. Corundum

D. Bakelite
444. Dehydrogenation of ethyl benzene produces __________________ ?
comments icon0

A. Naphthalene

B. Benzoic acid

C. Styrene

D. Phenol

445. Carboxymethyl cellulose (CMC) is added in detergents to act as a/an___________________?
comments icon0

A. Optical brightening agent

B. Anti soil redeposition agent

C. Builder

D. Surfactant

447. Triple superphosphate is manufactured by reacting ____________________?
comments icon0

A. Phosphate rock with nitric acid

B. Phosphate rock with sulphuric acid

C. Ammonium phosphate with phosphoric acid

D. Phosphate rock with phosphoric acid
448. Litharge is________________?
comments icon0

A. Zinc oxide

B. Cellulosic photographic material

C. Lead oxide

D. Zinc sulphide

449. Kopper-Totzek coal gasifier_________________?
comments icon0

A. Operate at very high pressure

B. Cannot use coking coal

C. Is a moving bed reactor

D. Can give ammonia synthesis gas (H2 + N2)
450. Cement mainly contains_________________?
comments icon0

A. CaO, MgO, K2O

B. CaO, SiO2, Al2O3

C. MgO, SiO2, K2O

D. Al2O3, MgO, Fe2O3