Chemical Process 1000+ MCQ with answer for SSC CPO

1. Lime and soda ash are added to water to remove
A. Bicarbonates & sulphates of calcium and magnesium
B. Undesirable taste and odour
C. Bacteria
D. Its corrosiveness
Answer : A

2. Viscose rayon
A. Cannot be made from sulphite pulp
B. Utilises H₂SO₄, NaOH and CS₂ during its manufacture
C. Cannot yield textile grade fibre
D. None of these
Answer : B

3. Lindane is
A. Not a fumigant
B. BHC (Benzene Hexachloride) containing 99% ?-isomer
C. A by-product of BHC manufacture
D. Both (B) and (C)
Answer : B

4. Na₂CO₃.10H₂O is called
A. Washing soda
B. Soda ash
C. Slaked lime
D. Quicklime
Answer : A

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

6. Maleic anhydride is produced by catalytic oxidation of
A. Toluene
B. Ethyl alcohol
C. Naphthalene
D. Benzene
Answer : D

7. 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

8. 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

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

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

12. Blue colour is imparted to glass by the addition of
A. FeSO₄
B. PbO
C. CaO
D. NaOH
Answer : C

13. Which is the most efficient absorbent for SO₃ out of the following?
A. 20% oleum
B. 65% oleum
C. 78% H₂SO₄
D. 98% H₂SO₄
Answer : D

14. Very fine suspended and colloidal impurities are removed from water by a process called
A. Sedimentation
B. Coagulation
C. Disinfection
D. Softening
Answer : B

15. Which of the following is an additional step in the manufacture of paper from bagasse as compared to that from bamboo?
A. Depithing
B. Digestion
C. Bleaching
D. None of these
Answer : A

16. Which of the following is a disaccharide?
A. Sucrose
B. Glucose
C. Starch
D. Maltose
Answer : A

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

18. Most commonly used rubber vulcanising agent is
A. Sulphur
B. Bromine
C. Platinum
D. Alumina
Answer : A

19. Dehydrogenation of ethyl benzene produces
A. Styrene
B. Naphthalene
C. Phenol
D. Benzoic acid
Answer : A

20. Drinking (potable) water treatment does not involve
A. Coagulation
B. Sedimentation
C. Softening
D. Disinfection
Answer : C

21. 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

22. Cement setting under water employs a/an __________ process.
A. Hydration
B. Decomposition
C. Oxidation
D. Reduction
Answer : A

23. Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
A. Surfactant
B. Builder
C. Optical brightening agent
D. Anti soil redeposition agent
Answer : D

24. 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

25. Use of chlorine in the treatment of sewage
A. Helps in grease separation
B. Increases the biological oxygen demand (BOD)
C. Causes bulking of activated sludge
D. Aids in flocculation
Answer : A

26. Polyvinyl chloride (PVC) is
A. A thermosetting material
B. A condensation polymerisation product
C. Made by employing emulsion polymerisation
D. None of these
Answer : C

27. 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

28. Carbon content of pitch (residue of coal tar distillation) is around __________ percent.
A. 70
B. 55
C. 80
D. 94
Answer : D

29. CO & H₂ are the constituents of
A. Producer gas
B. Water gas
C. Coke oven gas
D. All (A), (B) and (C)
Answer : D

30. Favourable conditions for the liquefaction of gases in general are
A. High pressure & low temperature
B. Low pressure & high temperature
C. High pressure & high temperature
D. Low pressure & low temperature
Answer : A

31. The terminology 'BTX' used in coal tar distillation industry refers to
A. Benzol-toluol-xylol
B. Benzol-toluene-xylene
C. Benzene-toluol-xylol
D. Benzene-toluene-xylene
Answer : D

32. A bio-catalyst produced by living cells which acts independent of the cell is called a/an
A. Substrate
B. Enzyme
C. Nutrient
D. None of these
Answer : B

33. Pick out the wrong statement.
A. Catalytic hydrogenation of carbon monoxide produces methyl alcohol
B. In nylon-6, the number 6 represents the total number of carbon atoms in the ring
C. Raw materials for DDT manufacture are benzene and chlorine
D. Ethanolamines are produced by using ammonia and ethylene oxide as raw material
Answer : C

34. Chalcopyrite is the main ore of
A. Copper
B. Lead
C. Tin
D. Iron
Answer : A

35. Sea weeds are an important source of
A. Fluorine
B. Chlorine
C. Bromine
D. Iodine
Answer : D

36. Vanillin is a type of
A. Anti-pyretic drug
B. Food preservative
C. Flavour
D. Dye
Answer : C

37. Soaps remove dirt by
A. Increasing the surface tension
B. Decreasing wettability
C. Supplying hydrophilic group
D. None of these
Answer : D

38. Which allotrope of sulphur is insoluble in carbon disulphide?
A. Rhombic sulphur
B. Monoclinic sulphur
C. Plastic sulphur
D. Milk of sulphur
Answer : C

39. Mercury cells for caustic soda manufacture, compared to diaphragm cells
A. Require lower initial investment
B. Require more power
C. Produce lower concentration NaOH
D. None of these
Answer : D

40. Thermosetting materials
A. Are cross-linked molecules
B. Soften on application of heat
C. Are solvent soluble
D. None of these
Answer : A

41. Nitric acid is not used in the manufacture of
A. Detergents
B. Fertilisers
C. Aqua regia
D. Explosives
Answer : A

42. Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?
A. Diaphragm electrolytic cell process
B. Mercury electrolytic cell process
C. Lime-soda process
D. None of these
Answer : C

43. Flux addition during smelting of ore is done to
A. Remove impurities/gangue
B. Enhance rate of reaction
C. Accelerate reduction of ore
D. Separate slag from metal
Answer : A

44. A 'unit process' is exemplified by the
A. Distillation
B. Hydrogenation of oils
C. Absorption
D. Humidification
Answer : B

45. 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

46. Liquefaction of gases cannot be done by
A. Exchange of heat with colder stream
B. Adiabatic expansion through a throttle valve (Joule-Thomson expansion)
C. Merely compressing it beyond critical pressure
D. Adiabatic expansion against a piston or in a turbine
Answer : C

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

48. Enzymes are organic catalysts used in the __________ reactions.
A. Chemical
B. Biochemical
C. Photochemical
D. Electrochemical
Answer : B

49. Starting material for the production of butadiene in India is
A. Naphthalene
B. Benzol
C. Ethyl alcohol
D. Phthalic anhydride
Answer : C

50. DDT should not be allowed to come in contact with iron (during its manufacture) to
A. Avoid its decomposition
B. Prevent sulphonation of the monochlorobenzene by the acid catalyst
C. Achieve non-hygroscopic property
D. None of these
Answer : A