Chemical Process MCQ Solved Paper for SSC JE

1. 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

2. The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by
A. Electrolysis
B. Electrolytic reduction
C. Electrolytic oxidation
D. None of these
Answer : B

3. Presence of carbonaceous matter in the sewage
A. Causes reduction in its dissolved oxygen content thereby endangering the life of aquatic creatures
B. Reduces sulphate ions to sulphides causing obnoxious smell
C. Increases the quantity of chlorine used for its purification
D. All (A), (B) and (C)
Answer : D

4. 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

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

6. Chemical name of soda ash is
A. Sodium bicarbonate
B. Sodium thiosulphate
C. Potassium carbonate
D. None of these
Answer : D

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

8. Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have
A. High electrical insulation properties
B. Sharp melting points
C. Low co-efficient of thermal expansion
D. Compressive strength much greater than their tensile strengths
Answer : B

9. The purpose of adding Na₂CO₃ to water of low alkalinity is to
A. Permit the use of alum as a coagulant
B. Increase the softening capacity of zeolite
C. Facilitate easy regeneration of zeolite
D. All (A), (B) and (C)
Answer : A

10. Bromine content in sea water may be around __________ ppm.
A. 70
B. 640
C. 1875
D. 2500
Answer : A

11. An oil is converted into fat by its
A. Hydrogenation
B. Hydrolysis
C. Hydrocracking
D. Hydration
Answer : A

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

13. Phthalic anhydride is made by the
A. Oxidation of naphthalene
B. Oxidation of benzene
C. Dehydrogenation of ethyl benzene
D. None of these
Answer : A

14. The ideal pulp for the manufacture of paper should have high __________ content.
A. Cellulose
B. Lignin
C. Both (A) & (B)
D. None of these
Answer : A

15. Insulin is an __________ drug.
A. Anti-malarial
B. Anti-TB
C. Antibiotic
D. None of these
Answer : D

16. The yield of tar from high temperature carbonisation of dry coal is about __________ percent.
A. 3
B. 12
C. 22
D. 0.3
Answer : A

17. Salt cake is chemically represented by
A. Na₂SO₄
B. CaSO₄. ½H₂O
C. MgSO₄
D. BaSO₄
Answer : A

18. Fish contains about __________ percent oil.
A. 5
B. 10
C. 20
D. 35
Answer : C

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

20. Nicotine is
A. A volatile alkaloid
B. Obtained by treating by-products of the tobacco processing industry
C. Both (A) and (B)
D. Neither (A) nor (B)
Answer : C

21. Sucrose is a
A. Monosaccharide
B. Disaccharide
C. Polysaccharide
D. None of these
Answer : B

22. Hard water
A. Does not affect the lather formation by soap
B. Is not unfit for drinking purpose
C. Pollutes the water stream
D. All (A), (B) and (C)
Answer : B

23. Hydrazine is used in water treatment for the removal of
A. Colloidal impurities
B. Dissolved oxygen
C. Turbidity
D. Chlorinous taste
Answer : B

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

25. Cumene is the starting material for the production of
A. Benzoic acid
B. Phenol and acetone
C. Isoprene
D. Styrene
Answer : B

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

27. Chemical formula of 'salt cake' is
A. Na₂SO₄
B. CaSO₄
C. MgSO₄
D. BaSO₄
Answer : A

28. Bleaching action of bleaching powder is due to its __________ properties.
A. Reducing
B. Oxidising
C. Disinfecting
D. None of these
Answer : B

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

30. Catalyst used in the hydrogenation of oil is
A. Nickel
B. Platinum
C. Iron
D. Alumina
Answer : A

31. Cumene (isopropyl benzene) is made by
A. Oxidation of naphthalene
B. Propylene alkylation of benzene
C. Polymerisation of a mixture of benzene & propylene
D. None of these
Answer : B

32. '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

33. Coke oven gas consists mainly of
A. H₂, & CH₄
B. CO, & CO₂
C. H₂, & CO
D. CH₄, & CO
Answer : A

34. During the manufacture of sulphuric acid, the temperature of molten sulphur is not increased beyond 160°C, as
A. It is very corrosive at elevated temperature
B. Its viscosity is not reduced on further heating (hence pressure drop on pumping it, cannot be further reduced)
C. It decomposes on further increasing the temperature
D. None of these
Answer : B

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. Dacron is a
A. Condensation product of Hexamethylene diamine and adipic acid
B. Thermosetting material
C. Condensation product of dimethyl terephthalate and ethylene glycol
D. None of these
Answer : D

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

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

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

40. Low purity oxygen is used for
A. L.D. steel making
B. Cutting and welding of metals
C. Medicinal purposes
D. Chemical oxidation processes
Answer : D

41. 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

42. Oil produced by solvent extraction
A. Has low free fatty acid content
B. Is odourless
C. Both (A) & (B)
D. Neither (A) nor (B)
Answer : D

43. Zeolite is used in the
A. Water treatment
B. Glass manufacture
C. Hydrogenation of fatty oil as a catalyst
D. Development of exposed photographic plate
Answer : A

44. Vulcanisation of rubber
A. Decreases its tensile strength
B. Increases its ozone & oxygen reactivity
C. Increases its oil & solvent resistance
D. Converts its plasticity into elasticity
Answer : D

45. A cane sugar factory having sugar production rate of 10 tons/day will produce about __________ tons/day of bagasse (after consumption by the factory for heating etc.).
A. 1
B. 10
C. 25
D. 40
Answer : B

46. Alum is commercially produced from
A. Gypsum
B. Feldspar
C. Galena
D. Bauxite
Answer : D

47. Liquor poisoning generally occurs due to the presence of __________ in it.
A. Ethyl alcohol
B. Impurities
C. Methyl alcohol
D. Carbonic acid
Answer : C

48. 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

49. 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

50. Nickel is not used as a catalyst in the __________ reaction.
A. Shift conversion
B. Oil hydrogenation
C. Steaming reforming of naphtha
D. Ammonia cracking/dissociation
Answer : A