Chemical Process MCQ Solved Paper for NEET PG

1. Which of the following fuel gases contains maximum amount of carbon monoxide?
A. Coke oven gas
B. Water gas
C. Blast furnace gas
D. L.D. converter gas
Answer : D

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

3. Ceramics are produced from silicates or clayish materials: Which of the following is not a ceramic material?
A. Slag cement
B. Glasses
C. Porcelain/Potteries
D. Teflon
Answer : D

4. Pasteurisation of milk means
A. Removal of fatty and albuminous substance from it
B. Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics
C. Inhibiting the growth of micro-organisms without killing them
D. None of these
Answer : B

5. Polycaprolactam is commercially known as
A. Nylon-6
B. Nylon-66
C. Dacron
D. Rayon
Answer : A

6. 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

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

8. Boiling of water containing temporary hardness produces
A. CO₂
B. CaSO₄
C. CaHCO₃
D. None of these
Answer : A

9. Styrene (a monomer for the production of polystyrene) is commercially produced by
A. Catalytic dehydrogenation of ethyl benzene
B. Dehydration of ethyl alcohol followed by hydrogenation
C. Reacting ethylene oxide with acetaldehyde
D. Fermentation of starch
Answer : A

10. Common salt is generally not produced commonly by __________ method from brine.
A. Freeze drying
B. Electrolytic
C. Solar evaporation
D. Vacuum evaporation
Answer : A

11. Air used in aerobic fermentation must be sterilized, otherwise the
A. Recovery of product will be difficult
B. Contamination of pure culture would result
C. Uniformity of product cannot be achieved
D. None of these
Answer : B

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

13. 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

14. 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

15. 'Hollander beater' machine used in the paper manufacturing plant does not accomplish the task of
A. Final rolling out of paper
B. Cutting of fibres
C. Hydration of fibres
D. Fibrillation of fibre
Answer : A

16. Pick out the true statement pertaining to water treatment.
A. Slow sand filters can remove colour completely
B. Activated carbon can be used for taste & odour control without subsequent filtration
C. Application of activated carbon reduces the temporary hardness of water
D. Normally, the turbidity is removed by adding a coagulant prior to sedimentation
Answer : D

17. 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

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

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

20. Chemical name of 'alum' is
A. Barium sulphate
B. Aluminium sulphate
C. Aluminium chloride
D. Calcium sulphate
Answer : B

21. __________ Nature of hypo (sodium thiosulphate) makes it useful in photography.
A. Oxidising
B. Reducing
C. Complex forming
D. Photochemical
Answer : C

22. 10% oleum comprises of 10% free
A. SO₂
B. H₂SO₃
C. SO₃
D. H₂SO₄
Answer : C

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

24. Chemical formula of oleum is
A. H₂SO₃
B. H₂SO₄
C. H₂S₂O₇
D. H₂SO₇
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. Sodium chloride content in sea water is about __________ gms/litre.
A. 2
B. 10
C. 25
D. 50
Answer : C

27. Which of the following is not responsible for causing permanent hardness of water?
A. Ca(HCO₃)₂
B. CaCl₂
C. MgCl₂
D. None of these
Answer : A

28. In contact process, SO₃ is absorbed in 97% H₂SO₄ and not in water, because
A. SO₃ gas is sparingly soluble in water
B. Water forms an acid mist, which is difficult to absorb
C. The purity of acid is affected
D. Scale formation in the absorber is to be avoided
Answer : B

29. 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

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

31. 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

32. Chemical name of Grignard reagent is
A. Sodium thiosulphate
B. Ethyl magnesium chloride
C. Sodium sulphite
D. Sodium bicarbonate
Answer : B

33. Enamels
A. Give good glossy finish
B. Are same as varnish
C. Are prepared from non-drying oil
D. Do not contain pigment
Answer : A

34. In nylon-66, the first and second numbers (i.e., 6) respectively designate the number of carbon atoms present in the
A. Diamine and the ring
B. Dibasic acid and the ring
C. Diamine and the dibasic acid
D. None of these
Answer : C

35. __________ of rubber decreases after its vulcanisation.
A. Resistance to the action of organic solvent
B. Tackiness
C. Maximum service temperature
D. Tensile strength
Answer : B

36. Which of the following may be viewed as a catalyst in the manufacture of soda ash by Solvay process?
A. NH3
B. NaCl
C. CaO
D. Coke
Answer : A

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

38. Haemoglobin is a/an
A. Amino acid
B. Biological catalyst
C. Protein
D. Enzyme
Answer : C

39. Average sulphur content in Indian pyrites is about __________ percent.
A. 15
B. 35
C. 55
D. 70
Answer : B

40. Which of the following is a co-product during the manufacture of caustic soda by electrolysis of brine?
A. Na₂CO₃
B. NaHCO₃
C. H₂
D. None of these
Answer : C

41. Electric bulbs are made of __________ glass.
A. Jena
B. Flint
C. Crookes
D. Pyrex
Answer : B

42. 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

43. Process conditions in fermentator used for production of penicillin is
A. 25°C, 2 atm
B. 50°C, l0 atm
C. 30°C, 200 mm Hg (absolute)
D. 90°C, 45 atm
Answer : A

44. Phenol formaldehyde
A. Employs addition polymerisation
B. Employs condensation polymerisation
C. Is a monomer
D. Is an abrasive material
Answer : B

45. Which of the following is an ore of iron?
A. Galena
B. Chalcopyrite
C. Hematite
D. Bauxite
Answer : C

46. With increase in temperature, the equilibrium constant at constant pressure (Kp) for oxidation of sulphur dioxide
A. Increases
B. Increases linearly
C. Decreases
D. Decreases linearly
Answer : C

47. Which of the following is not an antibiotic?
A. Penicillin
B. Streptomycin
C. Tetracycline
D. Quinine
Answer : D

48. 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

49. Pick out the wrong statement.
A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence of oleum, which is a highly exothermic reaction
B. Chloral is obtained by the chlorination of ethyl alcohol
C. Insecticides acting on the insects through the respiratory system are called fumigants
D. Benzene hexachloride is not a contact insecticide
Answer : D

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