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

1. Hydrogenation of oil does not
A. Remove double bonds
B. Raise its melting point
C. Improve its resistance to oxidation
D. None of these
Answer : D

2. The catalyst used in the manufacture of DDT is
A. Alumina
B. Silica
C. 20% oleum
D. Aluminium chloride
Answer : C

3. Rosin soap is added during paper manufacture to
A. Impart adhesive properties
B. Improve opacity
C. Impart resistance to penetration by liquids
D. None of these
Answer : C

4. Sea water contains about __________ ppm of bromine.
A. 5
B. 70
C. 500
D. 1700
Answer : B

5. 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

6. Soap cannot be used with hard water, because
A. Hard water contains sulphate
B. They form insoluble calcium soaps which precipitate
C. They attract back the removed dirt
D. None of these
Answer : B

7. Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials.
A. Adsorbs
B. Oxidises
C. Reduces
D. Converts
Answer : A

8. One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to
A. Adjust the pH of the syrup
B. Remove the coloring matter from the syrup
C. Reduce the viscosity of the syrup
D. Improve the rate of crystallisation of sugar
Answer : A

9. 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 : D

10. Gypsum is chemically
A. Calcium chloride
B. Potassium sulphate
C. Sodium sulphate
D. Calcium sulphate
Answer : D

11. Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H₂O = Fe₃O₄ + 4H₂, is not practised, as it is
A. A slow reaction
B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
C. Still in development stage (by employing fluidised bed technique)
D. All (A), (B) and (C)
Answer : D

12. Which of the following is used as a coagulant in treating turbid water?
A. Chlorine
B. Ferric sulphate
C. Calcium sulphate
D. Activated carbon
Answer : B

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

14. 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

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

16. Manufacture of phthalic anhydride uses __________ as a catalyst.
A. Ni
B. Cr
C. V₂O₅
D. Al₂O₃
Answer : C

17. Anion exchanger is regenerated usually with
A. NaOH
B. H2SO4
C. Hydrazine
D. Alum solution
Answer : A

18. Pick out the wrong statement.
A. Dry process is used for the manufacture of cement, when the raw material is blast furnace slag
B. Portland cement is made employing wet process
C. Gypsum is added to Portland cement to lengthen its setting time
D. None of these
Answer : D

19. Percentage of uranium in Carnotite ore found in Jadugoda (Jharkhand) is about
A. 0.1 to 0.5
B. 1 to 5
C. 5 to 10
D. 15 to 25
Answer : A

20. Percentage of alcohol in beer may be around __________ percent.
A. 2-8
B. 18-23
C. 27-32
D. 1-4
Answer : A

21. CaSO4 . ½H₂O is known as
A. Blue vitriol
B. Plaster of Paris
C. Gypsum
D. Zeolite
Answer : B

22. 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

23. Pick out the wrong statement pertaining to the soap manufacture.
A. Transparent soaps are made by cold process
B. Organic pigments are used as colouring materials in the soap manufacture
C. Both laundry as well as toilet soaps are manufactured by hot process
D. Colourless rosin is used in the manufacture of laundry soaps
Answer : A

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

25. 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

26. Which of the following is a detergent?
A. Fatty alcohol
B. Alkyl benzene sulphonate (ABS)
C. Fatty acids
D. Methylene chloride
Answer : B

27. Solvay process as compared to dual process
(i.e. modified Solvay process).
A. Can use low grade brine
B. Has less corrosion problems
C. Involves higher investment in NH3 recovery units than that for crystallisation units for NH4Cl
D. Both (B) and (C)
Answer : D

28. Very dilute solutions are generally used in fermentation reactions for which the optimum temperature range is __________ °C.
A. -5 to 0
B. 5 to 10
C. 30 to 50
D. 75 to 80
Answer : C

29. Sizing material is incorporated in paper to
A. Impart resistance to penetration by liquids
B. Increase its thickness
C. Increase its flexibility & opacity
D. Increase its brightness
Answer : A

30. Basic oxide is absent in __________ glass.
A. Flint
B. Pyrex
C. Quartz
D. All (A), (B) & (C)
Answer : C

31. 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

32. Which of the following is an explosive?
A. Nitro-glycerine
B. Trinitrotoluene (TNT)
C. Cellulose nitrate
D. All (A), (B), and (C)
Answer : D

33. Phenol is mainly used
A. To produce benzene
B. To produce phenol formaldehyde
C. To produce polyester resin
D. As a plasticiser for unsaturated polyester
Answer : B

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

35. 20% oleum means that in 100 kg oleum, there are 20 kg of
A. SO₃ and 80kg of H₂SO₄
B. H₂SO₄ and 80kg of SO₃
C. SO₃ for each 100 kg of H₂SO₄
D. None of these
Answer : A

36. Catalyst used in the oxidation of benzene to produce Maleic anhydride is
A. V₂O₅
B. Pt
C. Ni
D. Cr
Answer : A

37. A substance produced by a living organism and capable of anti-microbial activity is called a/an
A. Antibiotic
B. Antiseptic
C. Disinfectant
D. None of these
Answer : A

38. In multistage equilibrium conversion of SO₂ to SO₃ (2SO₂ + O₂ ? 2SO₃), the reverse reaction becomes appreciable at a temperature of 550° C. The percentage equilibrium conversion of SO₂ to SO₃ can be increased by
A. Increasing the oxygen concentration
B. Putting more quantity of V2O5 catalyst in the converter
C. Removing some quantity of SO3 during intermediate stage
D. Maintaining low temperature & pressure in the converter
Answer : C

39. Nylon-6 is a
A. Polyamide
B. Thermosetting resin
C. Polyester
D. None of these
Answer : A

40. Fatty material used in soap making is
A. Fatty acid
B. Fatty alcohols
C. Tallow
D. Detergents
Answer : C

41. Which of the following is the purest form of water out of the following?
A. Underground water
B. Rain water
C. Well water
D. Lake water
Answer : B

42. Sodium carbonate (soda ash) is not used in the manufacture of
A. Fire extinguishers
B. Sugar
C. Baking powder
D. Detergents
Answer : D

43. 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

44. Bleaching powder (chemically known as calcium chloro hypochlorite) is commercially produced by the action of chlorine on
A. Slaked lime
B. Soda lime
C. Calcium perchlorate
D. None of these
Answer : A

45. Carboxymethyl cellulose (CMC) is added in detergents to
A. Prevent redeposition of soil on cleaned surface
B. Act as optical brightening agent
C. Inhibit corrosion in washing machines made of aluminium
D. None of these
Answer : A

46. Production of alcohol by fermentation of molasses is a/an __________ process.
A. Anaerobic
B. Aerobic
C. Endothermic
D. Both (B) and (C)
Answer : B

47. Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
A. V₂O₅ & Cr₂O₃.
B. Oxides of nitrogen & Cr₂O₃
C. V₂O₅ on a porous carrier & oxides of nitrogen
D. Oxides of nitrogen & V₂O₅ on a porous carrier
Answer : D

48. Fourdrinier machine is used in the manufacture of
A. Sugar
B. Paper
C. Alcohol from molasses
D. Phenol formaldehyde
Answer : B

49. Platinum catalyst used in the earlier days of sulphuric acid manufacture by contact process suffers from the drawback like
A. High cost
B. Fragile nature
C. Easy poisoning tendency
D. All (A), (B) and (C)
Answer : D

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