Chemical Process MCQ Solved Paper for SSC MTS

1. Kopper-Totzek coal gasifier
A. Can give ammonia synthesis gas (H2 + N2)
B. Is a moving bed reactor
C. Cannot use coking coal
D. Operate at very high pressure
Answer : A

2. Trinitrotoluene (TNT), an explosive, is made by the nitration of
A. Nitrobenzene
B. Toluene
C. Nitrotoluene
D. Benzene
Answer : B

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

4. Raw material used in alcohol distilleries in India is
A. Molasses
B. Benzol
C. Methylated spirit
D. None of these
Answer : A

5. Transportation of 35% oleum during winter suffers from the problem of freezing, which can be overcome by the addition of small quantity of
A. Nitric acid
B. Hydrochloric acid
C. Methyl alcohol
D. Formic acid
Answer : A

6. __________ is obtained as a by-product in the manufacture of sodium hydroxide using brine.
A. Chlorine
B. Ammonium chloride
C. Sodium carbonate
D. Sodium bi-carbonate
Answer : A

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

8. Industrial production of chloroform requires acetone and
A. Phosgene
B. Calcium hypochlorite
C. Chlorine
D. Ammonium chloride
Answer : B

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

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

11. 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

12. Raw materials used for producing __________ cement does not contain iron oxide.
A. Waterproof
B. Slag
C. White
D. Pozzolan
Answer : C

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

14. Molecular weight of plastics ranges from
A. 5000 to 10000
B. 20000 to 250000
C. 500 to 5000
D. 106 to 109
Answer : B

15. Commercially ethylene is produced from naphtha by
A. Catalytic cracking
B. Catalytic dehydrogenation
C. Pyrolysis
D. Hydrocracking
Answer : D

16. Which of the following is not produced commercially from sea water?
A. Magnesium & potassium compounds
B. Common salt
C. Bromine
D. Iodine
Answer : D

17. Yeast is used in the manufacture of
A. Penicillin
B. Antibiotics
C. Wine
D. Pasteurised milk
Answer : C

18. 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

19. 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

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

21. Wet chlorine gas produced during electrolysis of brine is dehydrated by
A. Spraying 66° Be H2SO4 counter current to the flow of the gas
B. Passing it through a bed of diatomaceous earth
C. Passing it through a bed of silica gel
D. None of these
Answer : A

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

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

24. 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

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

26. Dacron (or Terylene) fibres as compared to nylon fibres have
A. Better heat & acid resistant properties
B. Poorer resistance to alkalis
C. Poorer dyeability
D. All (A), (B) and (C)
Answer : D

27. Oxygen is produced by fractionation of air using __________ process.
A. Linde's
B. Claude's
C. Either (A) or (B)
D. None of these
Answer : C

28. Which one of the following is not likely to be a constituent of vegetable oils?
A. Citric acid
B. Oleic acid
C. Stearic acid
D. Glycerol
Answer : A

29. Alum [Al₂(SO₄)₃] is used as a coagulant in water treatment to remove
A. Colour
B. Turbidity
C. Bacteria
D. All (A), (B) and (C)
Answer : D

30. Caprolactam (a raw material for nylon-6 manufacture) is produced from
A. Phenol
B. Naphthalene
C. Benzene
D. Pyridine
Answer : C

31. Plasticisers are added to paints to
A. Make it corrosion resistant
B. Make glossy surface
C. Give elasticity & prevent cracking of the film
D. Increase atmospheric oxidation
Answer : C

32. 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

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

34. Pig iron is produced by blast furnaces in India using mostly the iron ore named
A. Hematite
B. Magnetite
C. Siderite
D. Chalcopyrite
Answer : A

35. The most reactive allotropic form of phosphorus is __________ phosphorus.
A. Red
B. Yellow
C. Violet
D. Black
Answer : B

36. Which of the following is a bleaching agent added in the detergents to facilitate removal of stains caused due to blood, tea etc?
A. Sodium silicate
B. Sodium borate
C. Sodium tripolyphosphate (STPP)
D. Caustic soda
Answer : B

37. Commercial production of soda ash by Solvay process requires limestone, __________ as raw materials.
A. Coke and sand
B. Brine and coal
C. Coke and caustic soda
D. None of these
Answer : B

38. Which is the most suitable dye for synthetic fibres?
A. Acid dye
B. Azoic dye
C. Pigment dye
D. Mordant dye
Answer : A

39. Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
A. Calcium sulphate
B. Sodium chloride
C. Sodium sulphate
D. Magnesium chloride
Answer : B

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

41. The product obtained on mixing calcium oxide with water is called
A. Quicklime
B. Slaked lime
C. Milk of lime
D. None of these
Answer : B

42. Celluloid is chemically
A. Cellulose acetate
B. Regenerated cellulose
C. Cellulose nitrate
D. Cellulose acetate butyrate
Answer : C

43. In industrial nomenclature, alcohol means
A. Butyl alcohol
B. Propyl alcohol
C. Ethanol
D. Methyl alcohol
Answer : C

44. Glass is
A. Mainly CaO
B. Subjected to galvanising
C. A super cooled liquid
D. All (A), (B) and (C)
Answer : C

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

46. Hydrazine is largely used
A. As a starting material for 'hypo'
B. In photographic industry
C. As rocket fuel
D. In printing industry
Answer : C

47. Nitrogen is an essential component of
A. Mineral salts
B. Carbohydrates
C. Fats
D. Proteins
Answer : D

48. __________ is produced by the dehydrogenation of ethyl benzene.
A. Styrene
B. Ethyl alcohol
C. Cumene
D. Phenol
Answer : A

49. Zeolite used in water softening process (cation exchange) is regenerated by washing with
A. Brine
B. Chloramines
C. Sodium bisulphite
D. Liquid chlorines
Answer : A

50. Salt is added in the kettle during soap manufacture to separate
A. Soap from lye
B. Glycerine from lye
C. The metallic soap
D. The unsaponified fat from soap
Answer : A