LSAT - Chemical Process 1000+ MCQ [Solved] PDF Download

1. Sand and __________ is fused at 1300°C, to produce sodium silicate.
A. Limestone
B. Soda ash
C. Coke
D. Sodium sulphate
Answer : B

2. Fats as compared to oils have
A. More unsaturated glycerides of fatty acids
B. Less unsaturated glycerides of fatty acids
C. Much higher reactivity to oxygen
D. Lower melting point
Answer : B

3. Major component of flint glass is
A. Lead oxide
B. Silica
C. Alumina
D. Soda
Answer : A

4. Nylon-66 is manufactured from
A. Hexamethylene diamine and adipic acid
B. Hexamethylene diamine and Maleic anhydride
C. Caprolactam
D. Dimethyl terephthalate and ethylene glycol
Answer : A

5. Hydrophilic group of a soap or detergent solution is
A. Water hating
B. Soil loving
C. Water loving
D. None of these
Answer : C

6. Viscosity index improver (like polystyrene or polyisobutylene) is added to lubricant to
A. Reduce its viscosity
B. Increase its viscosity
C. Reduce the variation in its viscosity with temperature
D. Increase the variation in its viscosity with temperature
Answer : C

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

8. Function of sodium thiosulphate (hypo) in development of photographic film/plate is to
A. Brighten the faint images
B. Remove metallic silver
C. Convert silver chloride to silver
D. Remove unexposed silver halide
Answer : D

9. At a given temperature, the equilibrium yield of SO3 obtained from the oxidation of SO2 is proportional to (where, P = pressure of the system).
A. P
B. ?P
C. P²
D. 1/P
Answer : B

10. Linde process of gas liquefaction employs
A. Exchange of heat with colder stream
B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
C. Adiabatic expansion against a piston or in a turbine
D. Merely compressing the gas beyond its critical pressure
Answer : B

11. The amount of benzene present in pure Benzol is about __________ percent.
A. 30
B. 50
C. 70
D. 90
Answer : C

12. The main product of high temperature carbonisation of coal is
A. Coke
B. Ammonia
C. Tar
D. Phenol
Answer : A

13. Silicone is a/an
A. Thermoplastic
B. Inorganic polymer
C. Monomer
D. None of these
Answer : B

14. Oleum produces fumes of
A. SO₂
B. H₂SO₄
C. SO₃
D. SO₂ + H₂SO₄
Answer : C

15. Function of thinner in a paint is to
A. Accelerate the oxidation of oil
B. Prevent gelling of the paint
C. Suspend pigments & dissolve film forming materials
D. Form a protective film
Answer : C

16. Dichloro diphenyl __________ is the full form of DDT (an insecticide).
A. Tetrachloroethane
B. Trichloroethane
C. Tetrachloromethane
D. Trichloromethane
Answer : B

17. __________ is an ore concentrating metallurgical process involving a chemical change.
A. Electromagnetic separation
B. Froth floatation
C. Roasting
D. None of these
Answer : C

18. __________ is a thermosetting plastic.
A. Polythene
B. Epoxy polymer
C. P.V.C.
D. Polystyrene
Answer : B

19. 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

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

21. Catalytic oxidation of toluene produces
A. Styrene
B. Phenol
C. Benzene
D. Tri-nitro-toluene
Answer : B

22. Sulphuric acid saturated with SO₃ is called
A. Concentrated H₂SO₄
B. Sulphurous acid
C. Oleum
D. None of these
Answer : C

23. Most widely and commonly used coagulant for the removal of suspended impurities in water is
A. Bleaching powder
B. Slaked lime
C. Alum
D. Copper sulphate
Answer : C

24. Calgon used in water treatment is chemically
A. Sodium phosphate
B. Sodium hexametaphosphate
C. Calcium phosphate
D. Tricresyl phosphate
Answer : B

25. 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

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

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

28. Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
A. -83
B. -183
C. -196
D. -218
Answer : B

29. Fourdrinier machine is used in the manufacture of
A. Nylon-6
B. Paper
C. Antibiotics
D. Sugar
Answer : B

30. A mixture of chlorine & sodium bromide acts as a/an
A. Insecticides
B. Analgesic drug
C. Fire retardant
D. Hydrogenation catalyst
Answer : C

31. Starting material for the production of styrene butadiene rubber (SBR) is
A. Ethyl alcohol
B. Ethylene
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : C

32. Hydrazine (N₂H₄) is used mainly as a/an
A. Explosive
B. Rocket fuel
C. Detergents additive
D. None of these
Answer : B

33. 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

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

35. Temporary hardness of water can be removed by
A. Addition of alum (a coagulant)
B. Boiling
C. Filtration (through gravity sand filter)
D. Addition of lime
Answer : B

36. Liquor poisoning generally occurs due to the presence of __________ in it.
A. Ethyl alcohol
B. Impurities
C. Methyl alcohol
D. Carbonic acid
Answer : C

37. All enzymes are made of
A. Fats
B. Carbohydrates
C. Proteins
D. Amino acids
Answer : C

38. Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
A. Cutting
B. Fibrillation
C. Hydration
D. Strengthening
Answer : D

39. 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

40. Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture.
A. CaO
B. MnO₂
C. ZnO
D. FeS
Answer : C

41. Which of the following is an organometallic compound?
A. Isopropyl alcohol
B. Tetra-ethyl lead
C. Zeolite
D. Cumene
Answer : B

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

43. Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
A. Poor oxidation stability and high gum forming tendency
B. Greater tendency of decomposition at elevated temperature
C. Hydrolysis tendency in presence of water
D. All (A), (B) and (C)
Answer : D

44. 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

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

46. 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

47. 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 : B

48. __________ are added in lacquers to remove film brittleness and to improve adhereness.
A. Film forming materials
B. Plasticisers
C. Diluents
D. Solvents
Answer : B

49. Main constituent of limestone is
A. CaCO₃
B. MgCO₃
C. Na₂CO₃
D. CaSO₄
Answer : A

50. Free alkali in a toilet soap is __________ that in a laundry shop.
A. Less than
B. More than
C. Same
D. None of these
Answer : A