Engineering Chemistry mcq with answers pdf sppu

Q. 1. Which of the following metal salt is not responsible for permanent hardness in water?
A : CaSO4
B : MgSO4
C : Mg(HCO3)2
D : CaCl2

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Mg(HCO3)2

Q. 2. Soluble sutures are prepared from
A : Any polymer
B : Polyhydroxy butyrate
C : Polycarbonate
D : oligomer

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Polyhydroxy butyrate

Q. 3. Relationship between optical density and Transmittance is
A : A α -log T
B : A α – T
C : A α log T
D : A α -log (1/T)

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A α -log T

Q. 4. 1 ppm CaC03 equivalent hardness is meant by
A : 10 mg CaC03 equiv. Per litre
B : 100 mg CaC03 equiv. Per litre
C : 1 mg CaC03 equiv. Per litre
D : 103 mg CaC03 equiv. Per litre

1 mg CaC03 equiv. Per litre

Q. 5. Which of the following methods use ion selective membranes?
A : reverse osmosis
B : electrodialysis
C : ultra filtration
D : ion exchange

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electrodialysis

Q. 6. Useful range of degree of polymerization for commercial polymers is
A : 300 – 3000
B : 100 – 1000
C : 200 – 2000
D : 600 – 6000

200 – 2000

Q. 7. Which of the following comes under the wet corrosion?
A : Concentration cell corrosion
B : Oxidation corrosion
C : Liquid metal corrosion
D : Corrosion by other gases

Concentration cell corrosion

Q. 8. ____ is a catalyst used for free radical polymerization mechanism.
A : HCl
B : H2O2
C : BF3
D : Zeigler – Natta

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H2O2

Q. 9. Sludges deposition in boiler tube is minimized by
A : frequent blow down operation
B : addition of EDTA in feed water
C : addition of sodium phosphate in feed water
D : adjusting pH of water in boiler suitably

frequent blow down operation

Q. 10. _____ is the odorant added to LPG for detection of leakage
A : Ether
B : Esters
C : Mercaptans
D : Formaldehyde

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Mercaptans

Q. 11. The feedstock replaced by benzene in Alternative/greener pathway of adipic acid synthesis is
A : phosgene
B : tryptophan
C : bisphenol-A
D : glucose

glucose

Q. 12. The highest amount of energy required for electronic transition______
A : π to π*
B : π to σ*
C : n to π
D : σ to σ*

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σ to σ*

Q. 13. Ultracentrifugation measurement is done for measuring
A : Number average molecular weight
B : Weight average molecular weight
C : Z – average molecular weight
D : Viscosity average molecular weight

Z – average molecular weight

Q. 14. Glass electrode contains glass of composition
A : 72% SiO2, 6% CaO & 22% Na2O
B : 72% SiO2, 22% CaO & 6% Na2O
C : 22% SiO2, 72% CaO & 6% Na2O
D : 6% SiO2, 72% CaO & 22% Na2O

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72% SiO2, 6% CaO & 22% Na2O

Q. 15. Corrosion due to the formation of cavities around the metal is called as
A : Soil corrosion
B : Water line corrosion
C : Pitting corrosion
D : Galvanic corrosion

Pitting corrosion

Q. 16. Disproportionation is the way of chain ____
A : Initiation
B : Propagation
C : Multiplication
D : termination

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termination

Q. 17. As H+ concentration decreases, EMF of the cell
A : Decreases
B : Increases
C : Remains zero
D : Remains constant

Increases

Q. 18. The indicator electrode used in potentiometric cell is
A : platinum
B : aluminium
C : copper
D : None of the above

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platinum

Q. 19. Corrosion due to the flow of the _________ between the cathodic and anodic areas is
called as the electro chemical corrosion by evolution of hydrogen and absorption of oxygen.
A : Neutron current
B : Proton current
C : Ion current
D : Electron current

Electron current

Q. 20. Alkalinity in water cannot be due to
A : OH‑ ,HCO3- together
B : OH-,CO32- together
C : CO32-,HCO3- together
D : HCO3- only

OH-,CO32- together

Q. 21. The concept of Green Chemistry was coined by
A : Komiya.Et.al
B : Paul Anestas
C : Frost
D : Menzer

Paul Anestas

Q. 22. Zeolite cannot be regenerated, if water contains
A : Ca+2 ions
B : Both Ca+2 and Mg+2 ions
C : Mg+2 ions
D : Fe+2 and Mn+2 ions

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Fe+2 and Mn+2 ions

Q. 23. Corrosion between the dissimilar metals is called as
A : Dry corrosion
B : Galvanic corrosion
C : Oxidation corrosion
D : Concentration cell corrosion

Galvanic corrosion

Q. 24. Number average molecular weight is measured by
A : Osmotic pressure
B : Light scattering
C : Ultra centrifugation
D : Viscosity measurement

Osmotic pressure

Q. 25. Solid rubber can be coagulated from latex by adding
A : Hydrochloric acid
B : Sulphuric acid
C : Nitric acid
D : Acetic acid

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Acetic acid

Q. 26. Ignition temperature for a good quality fuel should be
A : High
B : Moderate
C : Low
D : Very low

Moderate

Q. 27. When CNG undergoes complete combustion the products formed are
A : CO2, H2O and SO2
B : CO2, H2O
C : CO2 only
D : CO2, CO, H2O

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CO2, H2O

Q. 28. In power alcohol ____ ethanol is blended with petrol and used as fuel in IC engines.
A : 80-90%
B : 40-50%
C : 20-25%
D : Less than 10%

20-25%

Q. 29. Which is not a buffer solution?
A : NH4Cl+NH4OH
B : CH3COONH4
C : CH3COONa + CH3COOH
D : Borax +Boric Acid

CH3COONH4

Q. 30. In fractional distillation of crude oil, hydrocarbons are separated according to their
boiling point range by stepwise cooling in such a way that
A : vapours of lower boiling point condense first
B : vapours of higher boiling point condense first
C : vapours of higher boiling point condense last
D : none of these

vapours of higher boiling point condense first

Q. 31. Smaller the grain size, corrosion is
A : Greater
B : Lower
C : Constant
D : Doesn’t affected

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Greater

Q. 32. Corrosion is a process reverse of ______ of metal
A : Destruction
B : Extraction
C : Rusting
D : Galvanizing

Extraction

Q. 33. In phosphate conditioning scales are converted into
A : loose ppt
B : soluble complex
C : gases
D : silicates

loose ppt

Q. 34. Functionality of monomer is
A : Extent of monomer’s function in polymerization
B : Number of functional groups in monomer
C : Number of reactive sites in monomer
D : None of these

Number of reactive sites in monomer

Q. 35. According to Beer’s law ,absorbance of the solution is proportional to ____ provided
that _____of solution remains constant.
A : Concentration and length
B : Length and concentration
C : Concentration and pH
D : Length and pH

Concentration and length

Q. 36. Which type of ligand is EDTA?
A : Tridentate ligand
B : Bidentate ligand
C : Hexadentate ligand
D : Monodentate ligand

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Hexadentate ligand

Q. 37. Formation of NaOH in boiler water results into
A : Priming
B : Phosphate conditioning
C : Boiler corrosion
D : Caustic embrittlement

Caustic embrittlement

Q. 38. Which of the following is not associated with the nature of metal?
A : Nature of oxide film
B : Nature of electrolyte
C : Purity
D : Physical state

Nature of electrolyte

Q. 39. Which of the following metal is not used as a sacrificial anode?
A : Zinc
B : Copper
C : Magnesium
D : Aluminium

Copper

Q. 40. The relationship between equivalent and specific conductance is_________
A : Λ = 1000 k/C
B : k =10 Λ /C
C : Λ=100k/C
D : k =100 Λ /C

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Λ = 1000 k/C

Q. 41. Theoretical amount of O2 required for complete combustion of 1kg of carbon is
A : 2.67kg
B : 1kg
C : 10kg
D : 100 kg

2.67kg

Q. 42. Combustion method is used for determination of ___ in ultimate analysis of coal
A : H%
B : N%
C : S%
D : O%

H%

Q. 43. Liquid crystal phase is also called_________
A : Metabolic phase
B : Mesomorphic phase
C : Metamorphic phase
D : Material phase

Metamorphic phase

Q. 44. For applications like making of motor tyres, conveyer belts, wire and cable insulation
___ is used.
A : Natural rubber
B : Vulcanized Natural rubber
C : Styrene butadiene rubber
D : None of these

Styrene butadiene rubber

Q. 45. The corrected formula for calculation of Gross calorific value by Bomb calorimeter is
A : GCV= (W + w) (t2 – t1 + tc) + (ta + tf) cal/gm
x
B : GCV= (W + w ) (t2- t1 – tc) + (ta +tf) cal/gm
x
C : GCV= (W + w)(t2 – t1 + tc) ─ (ta + tf) cal/gm
x
D : None of the above

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GCV= (W + w)(t2 – t1 + tc) ─ (ta + tf) cal/gm x

Q. 46. Functionality of phenol is _________
A : 2
B : 3
C : 4
D : 5

3

Q. 47. Araldite contains ___ polymer
A : LDPE
B : HDPE
C : Polystyrene
D : Epoxy resin

Epoxy resin

Q. 48. Dry corrosion is also called as
A : Chemical corrosion
B : Electrochemical corrosion
C : Wet corrosion
D : Oxidation corrosion

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Chemical corrosion

Q. 49. In tranesterification process, to prepare biodiesel, ____ type of esters are converted to
____ esters of fatty acid
A : triglyceride, propyl
B : Triglyceride, methyl
C : Diglyceride, methyl
D : Diglyceride, propyl

Triglyceride, methyl

Q. 50. The accuracy of Beckmann’s thermometer is
A : 0.01oC
B : 0.1oC
C : 0.001oC
D : 1oC

0.001oC

Q. 51. Which method uses the powdered form of a coating to form the protective layer?
A : Electroplating
B : Hot dipping
C : Vapor plating
D : Cementation

Cementation

Q. 52. Alclad is the cladding method where _____ is coated with pure aluminum
A : Duralumin
B : Molybdenum
C : Tin
D : Silver

Duralumin

Q. 53. _______ is also known as ‘synthetic metal’
A : Polyethylene
B : Polycarbonate
C : Polyacetylene
D : polyester

Polyacetylene

Q. 54. Which of the following oxide film is protective?
A : Porous
B : Non porous
C : Volitile
D : None of above

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Non porous

Q. 55. Polymers used in cold countries should have
A : Lower Tg
B : Higher Tg
C : Tg = 0
D : None of these

Lower Tg

Q. 56. More active metal used in sacrificial anodic protection method is known as
A : Sacrificial anode
B : Sacrificial cathode
C : Active anode
D : Active cathode

Sacrificial anode

Q. 57. The chemical used for removing dissolved O2 in boiler feed water is
A : Hydrazine
B : Sodium alluminate
C : alum
D : sodium phosphate

Hydrazine

Q. 58. Ratio of volumes of metal oxides to metal is known as
A : Specific mass ratio
B : Volume ratio
C : Specific ratio
D : Specific volume ratio

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Specific volume ratio

Q. 59. Peaks resulting from n- π* transitions are shifted to shorter wavelength with increasing
solvent polarity, known as
A : Black shift
B : red shift
C : violet shift
D : blue shift

blue shift

Q. 60. Tinning is the example of
A : Anodic coatings
B : Cathodic coatings
C : Neither anode nor cathode
D : Both anode and cathode

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Cathodic coatings

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