LIC ADO - Chemical Process 1000+ MCQ [Solved] PDF Download

1. Thermosetting plastic materials
A. Can be repeatedly melted
B. Is useful for melt casting
C. Cannot be melted after forming
D. Is useful for spinning
Answer : C

2. Which of the following has sodium bicarbonate as its main constituent?
A. Baking soda
B. Baking powder
C. Washing soda
D. None of these
Answer : B

3. 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

4. Yellow glycerine is made into white, using
A. Activated carbon
B. Diatomaceous earth
C. Bauxite
D. Bentonite
Answer : A

5. 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

6. High temperature carbonisation of coal takes place at __________ °C.
A. 2000
B. 700
C. 1100
D. < 500
Answer : C

7. The major constituents of glass are
A. Lime, clay and soda ash
B. Sand, lime and soda ash
C. Silica, alumina and clay
D. Silica, alumina and soda ash
Answer : B

8. Esterification reaction
A. Produces soap
B. Is reversible
C. Is a reaction between an alcohol and an organic acid
D. All (A), (B) and (C)
Answer : D

9. Fusion of bauxite and __________ produces high alumina cement.
A. Alum
B. Limestone
C. Coke
D. Quartz
Answer : B

10. The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to
A. Avoid mechanical weakening of fibre
B. Remove lignin by way of crystallisation
C. Increase the cellulose content
D. None of these
Answer : A

11. Glauber's salt is chemically represented by
A. Na₂SO₄.10H₂O
B. CaCl(OCl)
C. CaSO₄.H₂O
D. (NH₄)₂SO₄
Answer : A

12. Roasting of metallurgical ores is done mainly to
A. Dehydrate it
B. Sinter the ore
C. Remove CO₂ & H₂O
D. Remove arsenic & sulphur
Answer : D

13. Poly Tetrafluoroethylene (P.T.F.E.) is known as
A. Bakelite
B. Teflon
C. Celluloid
D. Dacron
Answer : B

14. Essential oils are usually obtained using
A. Steam distillation
B. Extractive distillation
C. Solvent extraction
D. Leaching
Answer : D

15. 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 : A

16. Phosphoric acid is prepared from
A. Cryolite
B. Chalcopyrite
C. Rock phosphate
D. None of these
Answer : C

17. The basic constituent of vegetable oils is
A. Triglyceride
B. Fatty acids
C. Fatty alcohol
D. Mono esters
Answer : A

18. Magnesium and calcium __________ cause temporary hardness of water.
A. Carbonates
B. Bicarbonates
C. Phosphates
D. Sulphates
Answer : B

19. 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

20. Metallic soap is __________ salt of fatty acids.
A. Sodium
B. Potassium
C. Both sodium & potassium
D. Aluminium or calcium
Answer : D

21. Main use of hydrazine is
A. As a rocket fuel
B. In water treatment
C. As a disinfectant
D. As fire retardant
Answer : A

22. Claude process of gas liquefaction employs
A. Merely compression of gas beyond its critical pressure
B. Joule-Thomson expansion cooling
C. Heat exchange with colder stream
D. Adiabatic expansion against a piston or in a turbine
Answer : D

23. Fluorescent dyes are added in detergents to
A. Act as fabric brightener (by converting ultraviolet light to visible light) thereby improving the whiteness appearance of white fabrics
B. Attain distinctiveness from other brands
C. Act as tarnish inhibitor for metals like German silver
D. None of these
Answer : A

24. Purity of oxygen used for blowing in steel making L.D. converter is 99.5%. The boiling point of oxygen is about __________ °C.
A. -53
B. -103
C. -183
D. -196
Answer : C

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

26. Pick out the wrong statement.
A. High early strength cement are made from materials having high silica to lime ratio
B. The function of gypsum in cement is to enhance its initial setting rate
C. Acid resistant cements are known as silicate cement
D. Major component of greyish Portland cement is tricalcium silicate
Answer : A

27. In the Lurgi coal gasifier
A. Coking coals cannot be used
B. Low carbon conversion efficiency is achieved
C. Entrainment of solids is higher
D. Large quantity of coal can be processed
Answer : D

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

29. Which glass is usually used in optical work?
A. Lead glass
B. High silica (borosilicate) glass
C. Photo-sensitive glass
D. Fibre glass
Answer : C

30. Styrene is produced from ethyl benzene by the process of
A. Dehydrogenation
B. Oxidation
C. Alkylation
D. Dehydration
Answer : A

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

32. __________ is the major constituent of the Portland cement.
A. Calcium carbonate
B. Calcium oxide
C. Tricalcium silicate
D. Calcium sulphate
Answer : C

33. Impurities present in brine is normally removed by treatment with
A. NH₃ and CO₂
B. Lime and soda ash
C. Lime, ammonia and carbon
D. All (A), (B) and (C)
Answer : D

34. Salt is the basic raw material for the manufacture of
A. Cement
B. Glass
C. Potteries
D. Caustic soda
Answer : D

35. Molecular weights of polymers are in the range of
A. 10² - 10²
B. 10⁵ - 10⁹
C. 10² - 10⁷
D. 10⁹ - 10¹¹
Answer : C

36. Inversion of sucrose produces
A. Fructose
B. Glucose
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : B

37. 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 : A

38. The noble gas which occurs most abundantly in the atmosphere is
A. Helium
B. Neon
C. Krypton
D. Argon
Answer : D

39. Fumigant insecticides
A. Kill insects, when they eat it
B. Emit poisonous vapour
C. Are absorbed throughout the plant
D. None of these
Answer : B

40. Sucrose content in cane sugar may be around __________ percent.
A. 50
B. 70
C. 95
D. 80
Answer : C

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

42. Catalyst used during the manufacture of 'Vanaspati Ghee' is
A. Zinc
B. Nickel
C. Platinum
D. Copper
Answer : B

43. Digestion of wood-base materials (for manufacture of pulp) is done to
A. Remove lignin
B. Produce long fibres
C. Prevent deterioration on storage
D. None of these
Answer : A

44. Sucrose content in the raw juice extracted from sugar cane is about __________ percent.
A. 1 - 2
B. 15 - 20
C. 50 - 60
D. 80 - 85
Answer : B

45. Caprolactam (a raw material for nylon-6 manufacture) is produced from
A. Phenol
B. Naphthalene
C. Benzene
D. Pyridine
Answer : C

46. Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent.
A. 10
B. 25
C. 50
D. 98
Answer : C

47. Starting raw material for the manufacture of Maleic anhydride is
A. n-butene
B. Benzene
C. Either (A) or (B)
D. Neither (A) nor (B)
Answer : C

48. Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
A. Sodium silicate
B. Sodium borate
C. Sodium tripolyphosphate (STPP)
D. Caustic soda
Answer : B

49. Direct conversion of chemical energy into electrical energy is done in a
A. Magnetohydrodynamic (MHD) generator
B. Fuel cell
C. Fast breeder reactor
D. None of these
Answer : B

50. Zeigler process
A. Produces high density polyethylene
B. Produces low density polyethylene
C. Uses no catalyst
D. Employs very high pressure
Answer : A