MCQOPTIONS
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MCQOPTIONS
This section includes 65 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following are not used lubricants? |
| A. | Oils |
| B. | Waxes |
| C. | Oleates |
| D. | Salts |
| Answer» E. | |
| 2. |
__________ prevent moulded article from sticking to the fabrication equipment. |
| A. | Catalyst |
| B. | Fillers |
| C. | Lubricants |
| D. | Stabilizers |
| Answer» D. Stabilizers | |
| 3. |
BUNA – S is otherwise called as __________ |
| A. | Sodium rubber |
| B. | Synthesized rubber |
| C. | Butadiene rubber |
| D. | Styrene rubber |
| Answer» E. | |
| 4. |
Glass laminates can be made by using ___________ |
| A. | Poly vinyl chloride |
| B. | Bakelite |
| C. | Polyethylene |
| D. | Phenol |
| Answer» C. Polyethylene | |
| 5. |
Which of the following rubber cannot be vulcanised? |
| A. | BUNA – S |
| B. | BUNA – N |
| C. | Thiokol rubber |
| D. | Teflon |
| Answer» D. Teflon | |
| 6. |
The low density polyethylene has the melting point. |
| A. | 840C |
| B. | 85C |
| C. | 860C |
| D. | 870C |
| Answer» E. | |
| 7. |
Extrusion moulding is for __________ |
| A. | Thermo plastic resins |
| B. | Thermo setting resins |
| C. | Both thermo plastic and thermo setting resins |
| D. | Neither thermo plastic nor thermo setting resins |
| Answer» B. Thermo setting resins | |
| 8. |
Poly vinyl acetate is soluble in the water. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Poly vinyl acetate is used in _________ |
| A. | Agriculture |
| B. | Food industry |
| C. | Catering |
| D. | Waste management |
| Answer» C. Catering | |
| 10. |
Initiators are __________ compounds. |
| A. | Stable |
| B. | Unstable |
| C. | Partially stable |
| D. | Highly stable |
| Answer» C. Partially stable | |
| 11. |
Poly carbonates are the durable materials with _________ |
| A. | Low impact resistances |
| B. | High scratch resistance |
| C. | Low scratch resistance |
| D. | Low transparency |
| Answer» D. Low transparency | |
| 12. |
The impact strength is measured as _________ |
| A. | Elasticity |
| B. | Strength |
| C. | Permeability |
| D. | Toughness |
| Answer» E. | |
| 13. |
The gaskets can be made by __________ |
| A. | Gutta-percha |
| B. | Nitrile rubber |
| C. | Thiokol rubber |
| D. | BUNA – S |
| Answer» D. BUNA – S | |
| 14. |
The BUNA – S is _________ chemicals. |
| A. | Attacked by |
| B. | Resistant to |
| C. | Neither resistant nor attacked |
| D. | Neutral |
| Answer» C. Neither resistant nor attacked | |
| 15. |
A hot, softened thermo plastic tube is called as _____________ |
| A. | Extruded tube |
| B. | Hopper |
| C. | Die |
| D. | Parison |
| Answer» E. | |
| 16. |
Thermo setting resins are __________ |
| A. | Soft |
| B. | Hard |
| C. | Weak |
| D. | Less brittle |
| Answer» C. Weak | |
| 17. |
" TEFLON is obtained by the chain polymerisation of tetra fluoro ethylene in presence of __________ as initiator." |
| A. | Hydrogen peroxide |
| B. | Hydrogen nitrate |
| C. | Hydrogen |
| D. | Benzoyl peroxide |
| Answer» E. | |
| 18. |
___________ is used to improve the thermal stability during polymerisation. |
| A. | Accelerators |
| B. | Colouring materials |
| C. | Stabilizers |
| D. | Lubricants |
| Answer» D. Lubricants | |
| 19. |
Tacticity of the polymers is the arrangement of the ___________ on carbon backbone. |
| A. | Hydrogen atoms |
| B. | Nitrogen atoms |
| C. | Functional groups |
| D. | Carbons |
| Answer» D. Carbons | |
| 20. |
Vulcanized BUNA – N is resistant to _________ |
| A. | High temperatures |
| B. | Low temperature |
| C. | Oils |
| D. | Acids |
| Answer» B. Low temperature | |
| 21. |
While producing smoked rubber, the latex and reacted with formic acid, the vertical partition plates are inserted and left undisturbed for _________ |
| A. | 13 hours |
| B. | 14 hours |
| C. | 15 hours |
| D. | 16 hours |
| Answer» E. | |
| 22. |
The elasticity of the rubber is due to its ___________ |
| A. | Trigonal planar |
| B. | Octahedral |
| C. | Pentagonal bipyramidal |
| D. | Helix |
| Answer» E. | |
| 23. |
How many types of methods of polymerization are there? |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Five |
| Answer» B. Three | |
| 24. |
The poly sulphide rubber is resistant to __________ |
| A. | Ozone |
| B. | Oils |
| C. | Chemicals |
| D. | Nitrogen |
| Answer» B. Oils | |
| 25. |
For free radical chain polymerisation _________ are the good initiators. |
| A. | Benzoyl peroxide |
| B. | Hydrogen peroxide |
| C. | Benzoyl peroxide and hydrogen peroxide |
| D. | Neither benzoyl peroxide nor hydrogen peroxide |
| Answer» D. Neither benzoyl peroxide nor hydrogen peroxide | |
| 26. |
If the polymer is in the room temperature then it is ___________ |
| A. | Brittle |
| B. | Viscofluid state |
| C. | Amorphous |
| D. | Rubbery |
| Answer» E. | |
| 27. |
The molecular weight of the step polymers is not the _________ |
| A. | Sum of the molecular weights of monomer |
| B. | Sum of the molecular weight of some monomers |
| C. | Sum of the water molecular weight |
| D. | Sum of the weights of the bi-products. |
| Answer» B. Sum of the molecular weight of some monomers | |
| 28. |
The polymers are classified into _________ types based on the nature of polymerization. |
| A. | 5 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 29. |
Bakelite is not _______ |
| A. | Hard |
| B. | Strong |
| C. | Rigid |
| D. | Weak |
| Answer» E. | |
| 30. |
Which of the following can be made by the BUNA – S? |
| A. | Cable insulations |
| B. | Coats |
| C. | Water proof clothes |
| D. | Cosmetics |
| Answer» B. Coats | |
| 31. |
Manufacture of tyres can be done by __________ |
| A. | BUNA – N |
| B. | Thiokol rubber |
| C. | Poly sulphide rubber |
| D. | BUNA – S |
| Answer» E. | |
| 32. |
BUNA – N is used in the auto mobiles because of its _______ |
| A. | Heavy weight |
| B. | Light weight |
| C. | Easy production |
| D. | Less cost of production |
| Answer» C. Easy production | |
| 33. |
The different monomers are arranged alternatively in __________ |
| A. | Alternate straight chain polymers |
| B. | Regular straight chain copolymers |
| C. | Straight chain copolymer |
| D. | Cross linked polymers |
| Answer» B. Regular straight chain copolymers | |
| 34. |
The fabrication cost is __________ for plastics. |
| A. | High |
| B. | Low |
| C. | Moderate |
| D. | Very high |
| Answer» C. Moderate | |
| 35. |
The step polymerisation takes place by __________ |
| A. | Addition reaction |
| B. | Condensation reaction |
| C. | Co-ordination polymerisation |
| D. | Anionic polymerisation |
| Answer» C. Co-ordination polymerisation | |
| 36. |
In compression moulding, the cavity is filled with ________ plastic. |
| A. | Solid |
| B. | Liquid |
| C. | Gaseous |
| D. | May be solid or liquid |
| Answer» C. Gaseous | |
| 37. |
BUNA – N can be vulcanised by __________ |
| A. | Sulphur |
| B. | Oxygen |
| C. | Sulphur dioxide |
| D. | Sulphurous acid |
| Answer» B. Oxygen | |
| 38. |
The thermo setting resins have three dimensional network structures. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 39. |
While producing the crepe rubber, the coagulam is passed between two rollers of about _________ wide. |
| A. | 3mm |
| B. | 4mm |
| C. | 50cm |
| D. | 100cm |
| Answer» D. 100cm | |
| 40. |
Alternate straight chain polymers are ___________ |
| A. | Soft and flexible |
| B. | Hard and flexible |
| C. | Soft and brittle |
| D. | Hard and brittle |
| Answer» B. Hard and flexible | |
| 41. |
The polymerisation of a diacid with diol produces ____________ |
| A. | Polyethylene |
| B. | Poly-ethane |
| C. | Poly-methane |
| D. | Polyester |
| Answer» E. | |
| 42. |
Phenol is made to react with formaldehyde in presence of acid or alkali produces ________ |
| A. | Phenol |
| B. | Poly vinyl chloride |
| C. | Plasticized poly vinyl chloride |
| D. | Polyethylene |
| Answer» B. Poly vinyl chloride | |
| 43. |
A polymeric molecules possess the molecular weight _____________ |
| A. | Different |
| B. | Fixed |
| C. | That cannot be determined |
| D. | May be determined |
| Answer» B. Fixed | |
| 44. |
The functionality of the monomer must be _________ |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Two or more than two |
| Answer» E. | |
| 45. |
While producing the smoked rubber, the sheets are hanged for about _________ in smoked chambers. |
| A. | 1day |
| B. | 2 days |
| C. | 3 days |
| D. | 4 days |
| Answer» E. | |
| 46. |
The strength of the polymer increases with ________ in molecular weight. |
| A. | Increase |
| B. | Decrease |
| C. | No change |
| D. | Slightly decrease |
| Answer» B. Decrease | |
| 47. |
Styrene rubber is vulcanised by ___________ |
| A. | Sulphurous oxide |
| B. | Sulphur mono chloride |
| C. | Sulphur-di-oxide |
| D. | Carbon |
| Answer» C. Sulphur-di-oxide | |
| 48. |
The plastics are _________ |
| A. | Semi conductors |
| B. | Conductors |
| C. | Conducts at above room temperature only |
| D. | Insulators |
| Answer» E. | |
| 49. |
Bakelite is __________ |
| A. | Good anion exchanging resin |
| B. | Attacked by acids |
| C. | Attacked by salts |
| D. | Resistant to alkalis |
| Answer» B. Attacked by acids | |
| 50. |
For making compostable packing material _______ is used. |
| A. | Poly lactic acid |
| B. | Polyhydroxy alkanoates |
| C. | Dacron |
| D. | Teflon |
| Answer» B. Polyhydroxy alkanoates | |