1000+ Chemical Process Multiple Choice Question Answer [Solved]

1. Glauber's salt is chemically
A. Calcium sulphate
B. Potassium sulphate
C. Potassium chlorate
D. None of these
Answer : D

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

3. Hydrocyanic acid (HCN) is used as an insecticide for
A. Controlling timber degradation by ants
B. Controlling poultry lice
C. Potato beetle
D. Citrus fruits
Answer : D

4. Rancidity of the fatty oil can be reduced by its
A. Decoloration
B. Hydrogenation
C. Oxidation
D. Purification
Answer : B

5. Chemical name of aspirin (an analgesic drug) is
A. Acetylsalicylic acid
B. Nictonic acid
C. Calcium acetate
D. Methyl salicylate
Answer : A

6. __________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
A. Solvay
B. Ostwald's
C. Haber's
D. None of these
Answer : B

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

8. 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 : B

9. A mineral is termed as 'ore', if
A. A metal can be economically extracted from it
B. It contains ? 40% metal
C. The metal present in it is costly
D. All (A), (B) and (C)
Answer : A

10. Polyvinyl chloride (PVC) is
A. A thermosetting material
B. A condensation polymerisation product
C. Made by employing emulsion polymerisation
D. None of these
Answer : C

11. Glycerine is a by-product of the __________ industry.
A. Soap
B. Detergent
C. Oil hydrogenation
D. Paint
Answer : A

12. Sulphuric acid is mainly used in the __________ industry.
A. Fertiliser
B. Steel
C. Paper
D. Paint
Answer : A

13. Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
A. Nylon-6
B. Dacron
C. Polyester
D. PVC
Answer : B

14. Permanent hardness of water can be removed by
A. Addition of soda ash to it
B. Treating it with zeolites
C. Passing it through sodium hexametaphosphate
D. All (A), (B), and (C)
Answer : D

15. Economics of 'Solvay Process' depends upon the efficiency of
A. Carbonating tower
B. Ammonia recovery
C. Ammonia recovery and size of the plant
D. Ammoniation of salt solution
Answer : C

16. 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

17. Oil is a/an
A. Mixture of glycerides
B. Mixture of glycerides of fatty acids
C. Solid at normal temperature
D. Ester of alcohols other than glycerine
Answer : B

18. In the manufacture of viscose rayon, the raw material used industrially is
A. Eucalyptus wood
B. Bamboo
C. Bagasse
D. Fine teak wood
Answer : D

19. The compressive strength of cement should not be less than about 110Kg/cm² after three days & not less than 170Kg/cm² after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm²/gm.
A. 800
B. 1600
C. 4000
D. 8500
Answer : B

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

21. Phenol formaldehyde is produced by condensation polymerisation. It is also known as
A. Teflon
B. Bakelite
C. Polyester
D. Nylon-66
Answer : B

22. Fusel oil is a/an
A. Essential oil
B. Extract from medicinal herbs
C. Mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
D. None of these
Answer : C

23. Double Contact Double Absorption (DCDA) process is the most recent process for the manufacture of
A. Nitric acid
B. Sulphuric acid
C. Ammonium sulphate
D. Hydrochloric acid
Answer : B

24. Commercial production of Vanaspati is done by __________ of edible vegetable oils.
A. Hydrogenation
B. Oxidation
C. Hydrolysis
D. Hydrocracking
Answer : A

25. Alcohol is produced by the
A. Oxidation of an aldehyde
B. Hydrolysis of an ether
C. Esterification of a fat
D. None of these
Answer : B

26. The biochemical treatment applied to sewage effluents is a process of
A. Dehydration
B. Reduction
C. Oxidation
D. Polymerisation
Answer : C

27. Hydrochloric acid is also known as
A. Oil of vitriol
B. Muriatic acid
C. Strong organic acid
D. Green acid
Answer : B

28. Which of the following coals has the highest calorific value?
A. Lignite
B. Sub-bituminous
C. Anthracite
D. Peat
Answer : C

29. 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

30. Pick out the wrong statement.
A. Low intensity explosives are also called propellants, whereas high intensity explosive are called detonators
B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
C. Lead azide is a popular military explosive
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human being
Answer : D

31. Which of the following is not a pyrite ore?
A. Celestite
B. Galena
C. Gypsum
D. Siderite
Answer : D

32. Phenol formaldehyde resin is used as an adhesive in making
A. Laminates
B. Card boxes
C. Furniture
D. Books
Answer : A

33. Helium is produced on commercial scale from
A. Air
B. Natural gas
C. Coke oven gas
D. None of these
Answer : B

34. Mercury cells for caustic soda manufacture, compared to diaphragm cells
A. Require lower initial investment
B. Require more power
C. Produce lower concentration NaOH
D. None of these
Answer : D

35. In the Solvay process, the product from the calciner is
A. Light soda ash
B. Dense soda ash
C. Sodium bicarbonate
D. Dehydrated soda ash
Answer : A

36. Use of chlorine in the treatment of sewage
A. Helps in grease separation
B. Increases the biological oxygen demand (BOD)
C. Causes bulking of activated sludge
D. Aids in flocculation
Answer : A

37. Phthalic anhydride is produced by the oxidation of
A. Naphthalene
B. Benzene
C. Toluene
D. Aniline
Answer : B

38. Dacron is a
A. Condensation product of Hexamethylene diamine and adipic acid
B. Thermosetting material
C. Condensation product of dimethyl terephthalate and ethylene glycol
D. None of these
Answer : D

39. The basic difference between vegetable oils and fats is in their
A. Density
B. Chemical properties
C. Physical state
D. Composition
Answer : C

40. The main use of HCl is in the
A. Drilling of petroleum wells and pickling of steel sheets
B. Manufacture of cationic detergent
C. Treatment of spent fuel of nuclear reactor
D. None of these
Answer : A

41. During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
A. It is very corrosive at elevated temperature
B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)
C. It decomposes on further increasing the temperature
D. None of these
Answer : B

42. Alcohol content in freshly prepared natural and fortified wine may be respectively around __________ percent.
A. 7-14 and 14-30
B. 7-14 and 40-50
C. 14 - 30 and 40-50
D. 10 - 20 and 40 - 50
Answer : A

43. 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 : A

44. Raw materials used for producing __________ cement does not contain iron oxide.
A. Waterproof
B. Slag
C. White
D. Pozzolan
Answer : C

45. Graphite is a/an
A. Electrical insulator
B. Allotrope of carbon
C. Moderator used in nuclear reactor
D. Both (B) and (C)
Answer : D

46. Production of one ton of cement requires about __________ tons of limestone.
A. 0.6
B. 1.2
C. 2.2
D. 3.8
Answer : B

47. Contact process of sulphuric acid manufacture
A. Yields acid of higher concentration than chamber process
B. Yields acids of lower concentration than chamber process
C. Is obsolete
D. Eliminates absorber
Answer : A

48. Prussian blue is chemically represented by
A. FeO.TiO₂
B. Ca SO₄ . 2H₂O
C. Fe₄ [Fe (CN₆)₃]
D. AlF₃ . 3N_aF
Answer : C

49. Varnish does not contain
A. Thinner
B. Pigment
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : B

50. The function of gypsum addition during cement making is to
A. Increase the density of cement
B. Decrease the cement setting rate
C. Both (A) and (B)
D. Neither (A) nor (B)
Answer : B