1000+ Chemical Process Multiple Choice Question Answer [Solved]

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

2. White phosphorous is stored under water, because
A. It does not react with water
B. It is poisonous
C. Its kindling temperature in dry air is very low
D. It is unstable
Answer : C

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

4. Which of the following is not a food additive?
A. Citric acid
B. Invertage
C. Benzoyl peroxide
D. Ammonium chloride
Answer : D

5. Hollander beater used during paper pulp manufacture does not facilitate the __________ of fibre.
A. Cutting
B. Fibrillation
C. Hydration
D. Strengthening
Answer : D

6. 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

7. 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

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

9. The manufacture of Kraft pulp is done by a/an __________ process.
A. Alkaline
B. Acidic
C. Neutral
D. None of these
Answer : A

10. Bitterns is a/an
A. Unsaturated fat
B. Starting material for the production of iodine
C. By-product of chlor-alkali industry
D. None of these
Answer : D

11. Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
A. As a lubricant
B. As a rust preventive
C. In hard water for cleaning of cloth
D. As a foam depressant in distillation column
Answer : A

12. The purpose of tanning in leather industry is to
A. Stiffen the leather
B. Smoothen the leather
C. Make it flexible
D. Impart water resistance
Answer : A

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

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

15. Ethyl alcohol cannot be produced
A. From waste sulphite substrate of paper mills
B. By Esterification and hydrolysis of ethylene
C. From molasses
D. None of these
Answer : D

16. 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

17. 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

18. 10% oleum comprises of 10% free
A. SO₂
B. H₂SO₃
C. SO₃
D. H₂SO₄
Answer : C

19. 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

20. Fumigant insecticides
A. Kill insects, when they eat it
B. Emit poisonous vapour
C. Are absorbed throughout the plant
D. None of these
Answer : B

21. Pick out the wrong statement.
A. Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye respectively
B. Protein catalysts are called enzymes
C. The rate of chemical reaction is independent of the concentration of reactants at high concentration of enzymes
D. Total sugar content in molasses is about 10%
Answer : D

22. The process involved in converting rubber into a thin sheet or coating it on fabric is called
A. Extrusion
B. Mastication
C. Calendaring
D. Vulcanisation
Answer : C

23. Raw materials for 'Solvay Process' for manufacture of the soda ash are
A. Salt, limestone and coke or gas
B. Ammonia, salt and limestone
C. Ammonia limestone and coke
D. None of these
Answer : A

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

25. The catalyst used in shift converter is
A. Nickel
B. Vanadium
C. Silica gel
D. Alumina
Answer : A

26. Fire clay is __________ refractory material.
A. A basic
B. An acidic
C. A neutral
D. Not a
Answer : B

27. Paper pulp produced by Kraft/sulphate process is
A. Bleached easily
B. Dull white in color
C. Strong fibrous
D. Dark colored
Answer : C

28. 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

29. Bakelite is chemically known as
A. Polyvinyl chloride (PVC)
B. Polybutadiene
C. Phenol formaldehyde
D. Polyurethane
Answer : C

30. __________ acid is the main constituent of cotton seed oil.
A. Acetic
B. Linoleic
C. Palmitic
D. Oleic
Answer : B

31. 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

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

33. Sodium salt of higher molecular weight fatty acid is termed as the __________ soap.
A. Hard
B. Soft
C. Metallic
D. Lubricating
Answer : B

34. Naphthalene is removed from coke oven gas by
A. Adsorbing on palladium
B. Absorbing in ethanolamine
C. Scrubbing with wash oil
D. Passing it through electrostatic precipitator
Answer : C

35. Bakelite is
A. Same as Polytetrafluoroethylene (PTFE)
B. An inorganic polymer
C. Same as thermosetting phenol-formaldehyde
D. Not a polymer
Answer : C

36. __________ 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

37. Dacron is a/an
A. Polyester
B. Unsaturated polyester
C. Polyamide
D. Inorganic polymer
Answer : A

38. Fusion of bauxite and __________ produces high alumina cement.
A. Alum
B. Limestone
C. Coke
D. Quartz
Answer : B

39. __________ is used as a flux in the smelting of copper ore like chalcopyrite.
A. Coke breeze
B. Lime powder
C. Silica/quartz
D. Dolomite
Answer : C

40. Main constituents of Portland cement are calcium aluminate and
A. Gypsum
B. Silicates
C. Sodium silicate
D. Carbonates
Answer : B

41. Oxygen is separated by distillation from air after its liquefaction. The boiling point of oxygen is about __________ °C.
A. -83
B. -183
C. -196
D. -218
Answer : B

42. The major constituent of black liquor generated during paper manufacture is sodium
A. Sulphate
B. Carbonate
C. Hydroxide
D. Bi-carbonate
Answer : B

43. Electro deposition of metals i.e. electroplating is never done on
A. Metals
B. Alloys
C. Refractories
D. Non-metals
Answer : C

44. Which of the following is not a raw material used for the manufacture of ordinary glass?
A. Iron oxide
B. Soda ash
C. Limestone
D. Silica
Answer : A

45. Penicillin, an antibiotic drug was discovered by
A. Alexander
B. Flaming
C. Doctor Zhivago
D. None of these
Answer : A

46. The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
A. SASOL (in South Africa)
B. Redcar (U.K.)
C. Los Angeles (U.S.A.)
D. Trombay (India)
Answer : A

47. Aryl benzene sulphonate (ABS) is a
A. Detergent
B. Plasticiser for unsaturated polyester
C. Starting material for the synthesis of glycerine
D. Coating ingredient for photographic film
Answer : A

48. 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

49. Massecuite is
A. Used for paper making
B. Used as a cattle feed
C. Highly acidic in nature
D. None of these
Answer : D

50. Helium is produced on commercial scale from
A. Air
B. Natural gas
C. Coke oven gas
D. None of these
Answer : B