Chemical Process Mcqs - Set 14

1)   Glycerine is not used in the____________________?

a. Manufacture of explosive
b. Conditioning and humidification of tobacco
c. Manufacture of pharmaceuticals
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


2)   High acid value of an oil or fat is an indication of _____________________?

a. Storage under improper conditions
b. Absence of unsaturation
c. Its smaller molecular weight
d. None of these
Answer  Explanation 

ANSWER: Storage under improper conditions

Explanation:
No explanation is available for this question!


3)   Brackish water which contains mostly dissolved salt, can be purified by the __________________ process?

a. Reverse osmosis
b. Sand filter
c. Lime soda
d. Permutit
Answer  Explanation 

ANSWER: Reverse osmosis

Explanation:
No explanation is available for this question!


4)   Dacron is a/an _________________?

a. Polyester
b. Unsaturated polyester
c. Polyamide
d. Inorganic polymer
Answer  Explanation 

ANSWER: Polyester

Explanation:
No explanation is available for this question!


5)   Litharge is________________?

a. Lead oxide
b. Zinc oxide
c. Zinc sulphide
d. Cellulosic photographic material
Answer  Explanation 

ANSWER: Lead oxide

Explanation:
No explanation is available for this question!


6)   Comparing sulphate process with sulphite process, we find that ______________ in the later ?

a. Both temperature & pressure in the former is less than that
b. Both temperature & pressure in the former is more than that
c. Temperature is more in the former whereas pressure is more
d. Pressure is more in the former whereas temperature is less
Answer  Explanation 

ANSWER: Both temperature & pressure in the former is more than that

Explanation:
No explanation is available for this question!


7)   Coal tar is used as a___________________?

a. Binding material for coal briquettes
b. Fuel in rotary kiln
c. Binder in making carbon electrodes
d. All A , B. and C.
Answer  Explanation 

ANSWER: All A , B. and C.

Explanation:
No explanation is available for this question!


8)   With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide________________?

a. Increases
b. Increases linearly
c. Decreases
d. Decreases linearly
Answer  Explanation 

ANSWER: Decreases

Explanation:
No explanation is available for this question!


9)   Trinitrotoluene (TNT), an explosive, is made by the nitration of ____________________?

a. Nitrobenzene
b. Toluene
c. Nitrotoluene
d. Benzene
Answer  Explanation 

ANSWER: Toluene

Explanation:
No explanation is available for this question!


10)   _____________ is used as a catalyst in fat splitting ?

a. ZnO
b. Ni
c. V2O5
d. FeO
Answer  Explanation 

ANSWER: ZnO

Explanation:
No explanation is available for this question!


11)   In the production of soda ash by Solvay process, the by-product is____________________?

a. CaCl2
b. NH4Cl
c. NH3
d. NaOH
Answer  Explanation 

ANSWER: CaCl2

Explanation:
No explanation is available for this question!


12)   Acetone is produced by catalytic dehydrogenation of_________________?

a. Phenol
b. Naphthalene
c. Isopropanol
d. Ethyl benzene
Answer  Explanation 

ANSWER: Isopropanol

Explanation:
No explanation is available for this question!


13)   ______________ is produced using molasses as the starting raw material ?

a. Methyl alcohol
b. Ethyl alcohol
c. Benzol
d. Dimethyl ether
Answer  Explanation 

ANSWER: Ethyl alcohol

Explanation:
No explanation is available for this question!


14)   How much temperature is maintained during quicklime manufacture in the calcination zone of the vertical shaft kiln ?

a. 500°C
b. 750°C
c. 1000°C
d. 1500°C
Answer  Explanation 

ANSWER: 1000°C

Explanation:
No explanation is available for this question!


15)   Vulcanisation of rubber____________________?

a. Decreases its tensile strength
b. Increases its ozone & oxygen reactivity
c. Increases its oil & solvent resistance
d. Converts its plasticity into elasticity
Answer  Explanation 

ANSWER: Converts its plasticity into elasticity

Explanation:
No explanation is available for this question!


16)   Hydrazine is largely used____________________?

a. As a starting material for ‘hypo’
b. In photographic industry
c. As rocket fuel
d. In printing industry
Answer  Explanation 

ANSWER: As rocket fuel

Explanation:
No explanation is available for this question!


17)   Pick out the wrong statement pertaining to solvent extraction of oil. Rate of extraction__________________?

a. Decreases with decrease of thickness of the flakes
b. Increases with the increasing flake size keeping the flake thickness constant
c. Increases considerably with the rise of temperature
d. Decreases as the moisture content of flakes increases
Answer  Explanation 

ANSWER: Decreases as the moisture content of flakes increases

Explanation:
No explanation is available for this question!


18)   Sodium salt of higher molecular weight fatty acid is termed as the ______________________ soap?

a. Hard
b. Soft
c. Metallic
d. Lubricating
Answer  Explanation 

ANSWER: Soft

Explanation:
No explanation is available for this question!


19)   Which of the following additives/water proofing agents is added to lower the hydrophilic (moisture loving) characteristic of cement ?

a. Xanthates
b. Stearic acid
c. Calcium & aluminium stearate
d. Formic acid
Answer  Explanation 

ANSWER: Calcium & aluminium stearate

Explanation:
No explanation is available for this question!


20)   The product obtained on mixing calcium oxide with water is called __________________?

a. Quicklime
b. Slaked lime
c. Milk of lime
d. None of these
Answer  Explanation 

ANSWER: Slaked lime

Explanation:
No explanation is available for this question!


21)   Zeolite used in water softening process (cation exchange) is regenerated by washing with___________________?

a. Brine
b. Chloramines
c. Sodium bisulphite
d. Liquid chlorines
Answer  Explanation 

ANSWER: Brine

Explanation:
No explanation is available for this question!


22)   The purpose of adding Na2CO3 to water of low alkalinity is to__________________?

a. Permit the use of alum as a coagulant
b. Increase the softening capacity of zeolite
c. Facilitate easy regeneration of zeolite
d. All A , B. and C.
Answer  Explanation 

ANSWER: Permit the use of alum as a coagulant

Explanation:
No explanation is available for this question!


23)   Main constituents of Portland cement are calcium aluminate and__________________?

a. Gypsum
b. Silicates
c. Sodium silicate
d. Carbonates
Answer  Explanation 

ANSWER: Silicates

Explanation:
No explanation is available for this question!


24)   Glauber’s salt is chemically represented by____________________?

a. Na2SO4.10H2O
b. CaCl(OCl)
c. CaSO4.H2O
d. (NH4)2SO4
Answer  Explanation 

ANSWER: Na2SO4.10H2O

Explanation:
No explanation is available for this question!


25)   Which of the following is used as a binding material in soap to improve soap texture ?

a. Rosin
b. Borax
c. Benzyl acetate
d. Sodium carbonate
Answer  Explanation 

ANSWER: Borax

Explanation:
No explanation is available for this question!


26)   Heating of _______________ to 120°C, produces plaster of paris ?

a. Blue vitriol
b. Gypsum
c. Calcium silicate
d. Calcium sulphate
Answer  Explanation 

ANSWER: Gypsum

Explanation:
No explanation is available for this question!


27)   Bromine content in sea water may be around _________________ ppm?

a. 70
b. 640
c. 1875
d. 2500
Answer  Explanation 

ANSWER: 70

Explanation:
No explanation is available for this question!


28)   Margarine is a/an____________________?

a. Fat
b. Explosive
c. Plasticiser
d. Rocket propellant
Answer  Explanation 

ANSWER: Fat

Explanation:
No explanation is available for this question!


29)   Cumene is the starting material for the production of________________?

a. Benzoic acid
b. Phenol and acetone
c. Isoprene
d. Styrene
Answer  Explanation 

ANSWER: Phenol and acetone

Explanation:
No explanation is available for this question!


30)   Liquefaction of gases cannot be done by___________________?

a. Exchange of heat with colder stream
b. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
c. Merely compressing it beyond critical pressure
d. Adiabatic expansion against a piston or in a turbine
Answer  Explanation 

ANSWER: Merely compressing it beyond critical pressure

Explanation:
No explanation is available for this question!


31)   Alcohol percentage in molasses may be around _____________________?

a. 10
b. 40
c. 70
d. 85
Answer  Explanation 

ANSWER: 40

Explanation:
No explanation is available for this question!


32)   Adipic acid is an intermediate in the manufacture of________________?

a. Perspex
b. Nylon-66
c. Polystyrene
d. Bakelite
Answer  Explanation 

ANSWER: Nylon-66

Explanation:
No explanation is available for this question!


33)   The process used for the manufacture of ethyl alcohol from molasses is_________________?

a. Distillation
b. Dehydration
c. Dehydrogenation
d. None of these
Answer  Explanation 

ANSWER: None of these

Explanation:
No explanation is available for this question!


34)   Presence of sodium tripolyphosphate (an additive) in synthetic detergent___________________?

a. Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)
b. Inhibits its corrosive effects
c. Does not allow redeposition of dirt on the cleaned surface
d. None of these
Answer  Explanation 

ANSWER: Facilitates its use even in hard water (by sequestering the water-hardening Ca & Mg ions)

Explanation:
No explanation is available for this question!


35)   Ultimate analysis of coal determines its _______________________ content?

a. Carbon, hydrogen, nitrogen & sulphur
b. Carbon, ash, sulphur & nitrogen
c. Carbon, sulphur, volatile matter & ash
d. Carbon, volatile matter, ash & moisture
Answer  Explanation 

ANSWER: Carbon, sulphur, volatile matter & ash

Explanation:
No explanation is available for this question!


36)   Poly Tetrafluoroethylene (P.T.F.E.) is known as___________________?

a. Bakelite
b. Teflon
c. Celluloid
d. Dacron
Answer  Explanation 

ANSWER: Teflon

Explanation:
No explanation is available for this question!


37)   Average sulphur content in Indian pyrites is about _________________ percent?

a. 15
b. 35
c. 55
d. 70
Answer  Explanation 

ANSWER: 35

Explanation:
No explanation is available for this question!


38)   Triple superphosphate is manufactured by reacting ____________________?

a. Phosphate rock with phosphoric acid
b. Phosphate rock with sulphuric acid
c. Phosphate rock with nitric acid
d. Ammonium phosphate with phosphoric acid
Answer  Explanation 

ANSWER: Phosphate rock with phosphoric acid

Explanation:
No explanation is available for this question!


39)   Gun powder uses_____________________?

a. Sulphur
b. Charcoal
c. Potassium nitrate
d. All A , B, & C.
Answer  Explanation 

ANSWER: All A , B, & C.

Explanation:
No explanation is available for this question!


40)   In industrial nomenclature, alcohol means_________________?

a. Butyl alcohol
b. Propyl alcohol
c. Ethanol
d. Methyl alcohol
Answer  Explanation 

ANSWER: Ethanol

Explanation:
No explanation is available for this question!