Chemical Process MCQ Solved Paper for SSC JHT

1. Diaphragm electrolytic cell as compared to mercury electrolytic cell
A. Produces 70% NaOH solution
B. Requires less specific power consumption for the production of chlorine
C. Requires lesser investment for similar capacity
D. All (A), (B) and (C)
Answer : C

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

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

4. Alcohol percentage in molasses may be around
A. 10
B. 40
C. 70
D. 85
Answer : B

5. 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

6. Zeolite is a/an
A. Naturally occuring clay which is capable of exchanging cations
B. Abrasive material
C. Catalyst used in shift conversion
D. None of these
Answer : A

7. Polymethyl methacrylate (PMMA) is known as
A. Bakelite
B. Teflon
C. Perspex
D. Nylon-6
Answer : C

8. Which is a high grade pulp?
A. Rag pulp
B. Mechanical pulp
C. Sulphate pulp
D. Sulphite pulp
Answer : C

9. Which of the following is an unsaturated fatty acid?
A. Lauric acid
B. Palmitic acid
C. Stearic acid
D. Oleic acid
Answer : D

10. __________ is an ore of lead.
A. Quartz
B. Galena
C. Siderite
D. Chalcopyrite
Answer : B

11. 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

12. Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale.
A. Nickel
B. Vanadium
C. Alumina
D. Iron
Answer : B

13. Fat dispersed in water is exemplified by
A. Colloids
B. Gel
C. Butter
D. Emulsion
Answer : C

14. Producer gas consists mainly of
A. CO, CO₂ N₂, H₂
B. CO, H₂
C. H₂, CH₄
D. C₂H₂, CO₂, H₂
Answer : A

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

16. In sulphate pulp manufacture, the pressure and temperature in the digestor is
A. 10 atm., 800 °C
B. 10 atm., 170-180°C
C. 1 atm., 170 - 180°C
D. 1 atm., 800°C
Answer : B

17. Platinum is a versatile catalyst for many processes in chemical industries. It is highly prone to be poisoned by the presence of
A. Carbon
B. Arsenic
C. Lead
D. Sulphur
Answer : B

18. The drug used in contraceptives is
A. Sulfadiazine
B. Mestranol
C. Methyl salicylate
D. Penicillin
Answer : B

19. Dechlorination of treated water is necessary to
A. Remove residual turbidity
B. Reduce the bacterial load on filter
C. Control taste and odour
D. Remove chlorinous taste
Answer : D

20. Argon is the third largest constituent of air (followed by N₂ & O₂). Its percentage by volume in air is
A. 0.14
B. 0.34
C. 0.94
D. 1.4
Answer : C

21. Setting of plaster of Paris is accompanied with
A. Hydration
B. Dehydration
C. Hydrolysis
D. Loss of CO₂
Answer : A

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

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

24. Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at __________ °C.
A. 15-30
B. 90-100
C. 250-300
D. < 0
Answer : A

25. 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

26. Chemical formula of BHC, which is an insecticide is
A. C₆H₆Cl₆
B. C₆Cl₆
C. C₆H₅Cl
D. C₆H₄Cl₂
Answer : B

27. Permanent hardness of water can be removed by
A. Simply boiling
B. Adding alum
C. Passing it through cation & anion exchangers
D. All (A), (B) and (C)
Answer : C

28. 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

29. 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

30. 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

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

32. Calcination of gypsum produces
A. Plaster of Paris
B. Salt cake
C. Nitre cake
D. Lime
Answer : A

33. 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

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

35. Chrome tanning and vegetable tanning are done for
A. Light & heavy leather respectively
B. Heavy & light leather respectively
C. Both light & heavy leather
D. Neither light nor heavy leather
Answer : A

36. Which of the following is the main constituent of the mother liquor produced in salt industry?
A. Quick lime
B. Glauber's salt
C. Salt petre
D. Bromine
Answer : D

37. 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

38. Coagulant is used __________ filtration.
A. Before
B. After
C. During
D. To avoid
Answer : A

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

40. Nitro-glycerine absorbed in wood flour, sodium nitrate or ammonium nitrate is commercially used as controlled explosive called dynamite. The raw material used for its manufacture are glycerine, nitric acid and
A. Sulphuric acid
B. Phosphoric acid
C. Hydrochloric acid
D. Hydrofluoric acid
Answer : A

41. Saponification number of an oil or fat
A. Gives an idea about its molecular weight
B. Is inversely proportional to its molecular weight
C. Detects its adulteration
D. All (A), (B) & (C)
Answer : D

42. 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

43. Fermentation of molasses to produce ethyl alcohol is done at __________ °C.
A. 20 - 30
B. < - 5
C. 100 - 150
D. 250 - 300
Answer : A

44. Conversion of CO to CO2 by steam in presence of a catalyst is called
A. Steam reforming
B. Shift conversion
C. Steam gasification
D. None of these
Answer : B

45. Proximate analysis of coal determines its __________ content.
A. Moisture, ash, sulphur & volatile matter
B. Moisture & volatile matter
C. Moisture, sulphur, nitrogen & fixed carbon
D. None of these
Answer : B

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

47. Pick out the wrong statement.
A. Cold rubber (SBR) is superior as compared to hot rubber (SBR)
B. Polymerisation temperature can modify the properties of SBR
C. Production of cold SBR employs lower pressure as compared to that of hot SBR
D. None of these
Answer : D

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. The most economical pulp for the production of newsprint would be the __________ pulp.
A. Ground-wood
B. Sulphate
C. Sulphite
D. Semi-chemical
Answer : A

50. In Kraft process of paper manufacture, white cooking liquor consists of caustic soda
A. Sodium sulphide & sodium carbonate
B. Sodium sulphite & sodium carbonate
C. Sodium sulphite & sodium sulphide
D. None of these
Answer : A