1000+ Chemical Process Multiple Choice Question Answer [Solved]

1. Shrinkage volume in cement setting does not depend upon the
A. Sand to cement ratio
B. Water to cement ratio
C. Ambient temperature fluctuation
D. Drying period
Answer : A

2. Thermal pyrolysis of ethylene dichloride produces
A. Trichloroethylene
B. Vinyl chloride
C. Ethanol amine
D. Ethylene oxide
Answer : B

3. Styrene-butadiene-rubber (SBR) as compared to natural rubber has
A. Poorer tensile strength
B. Poorer resistance to oxidation
C. Greater amount of heat build-up under heavy loading
D. All (A), (B) and (C)
Answer : D

4. Le-Blanc process is a primitive process for the manufacture of
A. Caustic soda
B. Soda ash
C. Bromine from sea water
D. Hydrochloric acid
Answer : B

5. __________ is a polysaccharide.
A. Maltose
B. Starch
C. Sucrose
D. Glucose
Answer : B

6. Alum is commercially produced from
A. Gypsum
B. Feldspar
C. Galena
D. Bauxite
Answer : D

7. Kaolin is a/an
A. Refractory material
B. Synthetic resin
C. Artificial abrasive
D. Blue pigment
Answer : A

8. Epoxy resin
A. Is a good adhesive
B. Is an elastomer
C. Cannot be used for surface coatings
D. Is a polyester
Answer : A

9. Acrylonitrile is mainly used in the __________ industry.
A. Polymer
B. Printing
C. Dyeing
D. Photographic
Answer : C

10. Nylon-6 is manufactured from
A. Caprolactam
B. Hexamethylene diamine and adipic acid
C. Hexamethylene diamine and Maleic anhydride
D. Hexamethylene diamine and Sebacic acid
Answer : A

11. The most stable allotropic form of phosphorous is the __________ phosphorous.
A. White
B. Black
C. Yellow
D. Red
Answer : B

12. Which of the following impurities in feed water for high pressure boiler is the most detrimental?
A. Silica
B. Dissolved oxygen
C. Suspended salt
D. Dissolved salt
Answer : A

13. Isopropyl benzene produced by alkylation of benzene with propylene is known as
A. Neoprene
B. Cumene
C. Gelatin
D. Mercaptans
Answer : B

14. Which of the following paper does not require a filler during manufacture?
A. Bond paper
B. Writing paper
C. Blotting paper
D. Coloured paper
Answer : C

15. 'Synthesis gas' meant for the synthesis of organic compound is a variable mixture of
A. N₂ & H₂
B. CO₂ & H₂
C. CO & H₂
D. C & H₂
Answer : C

16. Litharge is
A. Lead oxide
B. Zinc oxide
C. Zinc sulphide
D. Cellulosic photographic material
Answer : A

17. Fermentation is adversely affected by the
A. Presence of air
B. Absence of air
C. High concentration
D. Presence of ammonium salts
Answer : C

18. Insulin is an __________ drug.
A. Anti-malarial
B. Anti-TB
C. Antibiotic
D. None of these
Answer : D

19. Wax is a
A. Mixture of glycerides
B. Mixture of esters of polyhydric alcohols excepting glycerine
C. Liquid at room temperature
D. Mixture of glycerides of fatty acids
Answer : B

20. Builders are added in soap to act as
A. Cleaning power booster
B. Anti-redeposition agent
C. Corrosion inhibitor
D. Fabric brightener
Answer : A

21. Pick out the endothermic reaction out of the following.
A. C+ ½O₂ = CO
B. CO + 3H₂ = CH₄ + H₂O
C. CaCO₃ = CaO + CO₂
D. CO + ½O₂ = CO₂
Answer : C

22. Chemical formula of BHC, which is an insecticide is
A. C₆H₆Cl₆
B. C₆Cl₆
C. C₆H₅Cl
D. C₆H₄Cl₂
Answer : B

23. Bio-degradable detergents
A. Can be readily oxidised
B. Pose problem in sewerage plant
C. Have an isoparaffinic structure
D. Should not be used as it spoils the cloth
Answer : A

24. Naphthalene is removed from coke oven gas by
A. Adsorbing on palladium
B. Absorbing in ethanolamine
C. Scrubbing with wash oil
D. Passing it through electrostatic precipitator
Answer : C

25. Sugar content in sugarcane on cane basis is about __________ percent by weight.
A. 1 to 5
B. 5 to 10
C. 15 to 20
D. 20 to 30
Answer : B

26. Bleaching of paper pulp is done with
A. Activated clay
B. Bromine
C. Chlorine or chlorine dioxide
D. Magnesium sulphite
Answer : C

27. Tall oil obtained as a by-product from the black liquor recovery is
A. A black, sticky & viscous liquid
B. Used in the manufacture of greases, emulsions & soaps
C. Composed mainly of rosin & fatty acids
D. All (A), (B) & (C)
Answer : D

28. Cumene is the starting material for the production of
A. Benzoic acid
B. Phenol and acetone
C. Isoprene
D. Styrene
Answer : B

29. Which of the following contains least amount of N₂?
A. Coke oven gas
B. Blast furnace gas
C. Producer gas
D. Water gas (blue gas)
Answer : A

30. Pick out the wrong statement. Iodine value of an oil or fat is
A. The number of grams of iodine taken up by 100 gm of oil or fat
B. A measure of its unsaturation
C. Helpful in findings its adulteration & its suitability for making soap
D. Independent of the type of oil, whether it is drying or non-drying
Answer : D

31. Which of the following is not a product of coal tar distillation?
A. Anthracene
B. Creosote oil
C. Carbolic oil
D. None of these
Answer : D

32. Penicillin is made employing __________ fermentation process.
A. Continuous
B. Aerobic batch
C. Anaerobic batch
D. None of these
Answer : B

33. Titanium dioxide is a/an __________ colour pigment.
A. White
B. Black
C. Yellow
D. Blue
Answer : A

34. Ore concentration by froth floatation utilises the __________ of ore particles.
A. Density difference
B. Wetting characteristics
C. Terminal velocities
D. None of these
Answer : B

35. Trinitro-toluene (TNT) is
A. Used in glycerine manufacture
B. An explosive
C. Used in dye manufacture
D. None of these
Answer : B

36. In primitive days, __________ was being manufactured by Leblanc Process.
A. Alum
B. Washing soda
C. Soda ash
D. Calcium carbide
Answer : C

37. Pick out the exothermic reaction out of the following:
A. C + H₂O = CO + H₂
B. CaC₂ + H₂O = Ca(OH)₂ + C₂H₂
C. MgCO₃ = MgO + CO₂
D. All (A), (B) and (C)
Answer : B

38. Which of the following is not an insecticide?
A. Hydrocyanic acid
B. Nicotine
C. Sodium fluoride
D. Hexane
Answer : D

39. __________ paper is used in the manufacture of newsprint paper.
A. Ground-wood
B. Board
C. Tissue
D. Wrapping
Answer : A

40. __________ is produced using Polycondensation reaction.
A. Polythene
B. Phenol formaldehyde
C. Poly vinyl chloride
D. None of these
Answer : B

41. The most commonly used substance to speed up the sedimentation of sewage is
A. Lime
B. Sulphuric acid
C. Chlorine
D. Sodium bisulphite
Answer : A

42. Plaster of Paris is
A. CaSO₄. ½H₂O
B. Used for setting of broken bones
C. Both (A) and (B)
D. Same as gypsum
Answer : C

43. __________ process is used for the manufacture of sodium carbonate by ammonia soda process.
A. Ostwald's
B. Bosch
C. Solvay
D. Haber's
Answer : C

44. Reverse osmosis is normally used for the
A. Separation of isotopes of uranium from gaseous uranium hexafluoride
B. Separation of helium from natural gas
C. Desalination of brackish water to produce potable (drinking) water
D. Purification of oxygen
Answer : C

45. Yeast is used in the manufacture of
A. Penicillin
B. Antibiotics
C. Wine
D. Pasteurised milk
Answer : C

46. Dacron (or Terylene) fibres as compared to nylon fibres have
A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All (A), (B) and (C)
Answer : D

47. Reaction of an alcohol with organic acid is called the __________ reaction.
A. Saponification
B. Esterification
C. Neutralisation
D. Acidification
Answer : B

48. Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
A. Hard
B. Soft
C. Metallic
D. Lubricating
Answer : B

49. Bromine is used in the preparation of
A. Fire extinguishing compounds
B. Fire proofing agents
C. Dyes and antiknock compounds
D. All (A), (B) and (C)
Answer : D

50. The gasification reaction represented by, C + H₂O = CO + H₂, is a/an __________ reaction.
A. Exothermic
B. Endothermic
C. Catalytic
D. Autocatalytic
Answer : B