MCQOPTIONS
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MCQOPTIONS
This section includes 47 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. |
Plastics which when moulded once, cannot be softened by heating. Such plastics are called____ |
| A. | Polythene |
| B. | Thermoplastics |
| C. | Polyster |
| D. | Thermosetting plastics |
| Answer» C. Polyster | |
| 2. |
The 4 R Principle is |
| A. | Reduce, Reuse, Recycle, Recover |
| B. | Remember, reduce, Recycle, Rejoice |
| C. | Repeat, Rejoice, recycle, reduce |
| D. | None of the above |
| Answer» B. Remember, reduce, Recycle, Rejoice | |
| 3. |
Polycot is made by mixing two types of fibres namely |
| A. | Silk + Cotton |
| B. | Polythene + cotton |
| C. | Silk + Polyester |
| D. | Polyester + Cotton |
| Answer» E. | |
| 4. |
A chain of small chemical units combined to form a large single unit is called ____ |
| A. | Polymer |
| B. | Poly |
| C. | Polythene |
| D. | None of the above |
| Answer» B. Poly | |
| 5. |
Polythene and PVC are examples of |
| A. | Bio degradable substance |
| B. | Thermosetting plastics |
| C. | Thermoplastics |
| D. | Rayon |
| Answer» D. Rayon | |
| 6. |
The coating on modern non- stick cookware and electric iron is of |
| A. | Terrycot |
| B. | Rayon |
| C. | Polyester |
| D. | Teflon |
| Answer» E. | |
| 7. |
Bakelite and Melamine are examples of |
| A. | Thermosetting plastics |
| B. | Silk |
| C. | Nylon |
| D. | Rayon |
| Answer» B. Silk | |
| 8. |
Which of the following is Non-biodegradable |
| A. | Woolen clothes |
| B. | Plastic bag, |
| C. | Cotton cloth |
| D. | Wood |
| Answer» C. Cotton cloth | |
| 9. |
_____________ is an example of natural polymer |
| A. | Rayon |
| B. | Cellulose |
| C. | Nylon |
| D. | All of the above |
| Answer» C. Nylon | |
| 10. |
Fire proof plastic uniform worn by fire fighters has a coating of _____ to make it fireresistant. |
| A. | Nylon |
| B. | Rayon |
| C. | Melamine plastic |
| D. | Silk |
| Answer» D. Silk | |
| 11. |
The thermo plastics resins are usually soluble in _________ |
| A. | Organic solvents |
| B. | Only in some organic solvents |
| C. | Polar solvents |
| D. | Only in water |
| Answer» B. Only in some organic solvents | |
| 12. |
Thermo setting resins are __________ |
| A. | Soft |
| B. | Hard |
| C. | Weak |
| D. | Less brittle |
| Answer» C. Weak | |
| 13. |
The thermo setting resins have three dimensional network structures. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Thermo setting plastics are formed by _________ |
| A. | Step polymerisation |
| B. | Suspension polymerisation |
| C. | Emulsion polymerisation |
| D. | Co-ordination polymerisation |
| Answer» B. Suspension polymerisation | |
| 15. |
The heating and cooling of the thermo plastics _________the chemical nature. |
| A. | Alters |
| B. | Do not alters |
| C. | Alters slightly |
| D. | May be alters |
| Answer» C. Alters slightly | |
| 16. |
The plastics are _________ |
| A. | Semi conductors |
| B. | Conductors |
| C. | Conducts at above room temperature only |
| D. | Insulators |
| Answer» E. | |
| 17. |
The fabrication cost is __________ for plastics. |
| A. | High |
| B. | Low |
| C. | Moderate |
| D. | Very high |
| Answer» C. Moderate | |
| 18. |
Which of the following is not a property of plastics? |
| A. | Plastics are not ductile |
| B. | Plastics are organic in nature |
| C. | Plastics have good electric insulation properties. |
| D. | PVC plastics are inflammable |
| Answer» E. | |
| 19. |
Tributyl phosphate is an example of ___________ |
| A. | Hardener |
| B. | Pigment |
| C. | Plasticizer |
| D. | Filler |
| Answer» D. Filler | |
| 20. |
Hexamethylene tetramine serves as a hardener for ________ |
| A. | Cellulose |
| B. | Polystyrene |
| C. | Polyvinylchloride |
| D. | Phenol formaldehyde |
| Answer» E. | |
| 21. |
Homogeneous plastic is made of the chain containing only carbon atoms while heterogeneous plastic consists of the chain containing carbon and oxygen, nitrogen and other elements. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 22. |
Melamine is derived from ________ |
| A. | Silicon carbide |
| B. | Calcium silicate |
| C. | Calcium carbide |
| D. | Calcium sulphate |
| Answer» D. Calcium sulphate | |
| 23. |
Which of the following resins is obtained by the precipitation of milk with acids? |
| A. | Vinyl |
| B. | Casein |
| C. | Cellulose |
| D. | Alkyd |
| Answer» C. Cellulose | |
| 24. |
Which of the following statements about styrene is not true? |
| A. | Styrene is light in weight |
| B. | It has a low electrical resistance |
| C. | Water absorption of styrene is low |
| D. | Styrene is not easily attacked by chemicals |
| Answer» C. Water absorption of styrene is low | |
| 25. |
The components of alkyd are _______ |
| A. | Alcohol and phthalic acid |
| B. | Glycol and formic acid |
| C. | Glycerine and phthalic acid |
| D. | Glycerine and formic acid |
| Answer» D. Glycerine and formic acid | |
| 26. |
Which of the following resins is also known as acrylic? |
| A. | Methyl methacrylate |
| B. | Alkyd |
| C. | Styrene |
| D. | Vinyl |
| Answer» B. Alkyd | |
| 27. |
Which of the following is a thermoplastic resin? |
| A. | Casein |
| B. | Phenol formaldehyde |
| C. | Cellulose |
| D. | Urea-formaldehyde |
| Answer» D. Urea-formaldehyde | |
| 28. |
Which of the following types of plastics have a high modulus of elasticity? |
| A. | Rigid plastics |
| B. | Semi-rigid plastics |
| C. | Soft plastics |
| D. | Elastomers |
| Answer» B. Semi-rigid plastics | |
| 29. |
Which of the following statements about thermosetting plastics is not true? |
| A. | It is possible to change their shape on heating |
| B. | They are durable and strong |
| C. | They are available in a variety of colours |
| D. | They become rigid on heating |
| Answer» B. They are durable and strong | |
| 30. |
In addition polymerization, the molecular weight of the resulting polymer is the same as the sum of the molecular weights of the reacting molecules. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 31. |
Plastics are divided into thermoplastic and thermosetting on the basis of their ________ |
| A. | Behaviour with respect to heating |
| B. | Structure |
| C. | Physical properties |
| D. | Mechanical properties |
| Answer» B. Structure | |
| 32. |
Which of the following polymers is obtained by condensation polymerization? |
| A. | Polyethene |
| B. | Polystyrene |
| C. | Polyvinylchloride |
| D. | Carbamide |
| Answer» E. | |
| 33. |
THERMO_SETTING_PLASTICS_ARE_FORMED_BY_________?$ |
| A. | Step polymerisation |
| B. | Suspension polymerisation |
| C. | Emulsion polymerisation |
| D. | Co-ordination polymerisation |
| Answer» B. Suspension polymerisation | |
| 34. |
Thermo setting resins are __________$ |
| A. | Soft |
| B. | Hard |
| C. | Weak |
| D. | Less brittle |
| Answer» C. Weak | |
| 35. |
The thermo setting resins have three dimensional network structures. |
| A. | True |
| B. | False |
| Answer» C. | |
| 36. |
In thermo plastic resins the force of attraction can be break easily by ____________ |
| A. | Heat |
| B. | Pressure |
| C. | Both heat and pressure |
| D. | Neither heat nor pressure |
| Answer» D. Neither heat nor pressure | |
| 37. |
Which of the following is a thermo setting resins? |
| A. | Polyethylene |
| B. | Polyvinyl chloride |
| C. | Polyvinyl cyanide |
| D. | Bakelite |
| Answer» E. | |
| 38. |
The thermo plastics resins are usually soluble in _________ |
| A. | Organic solvents |
| B. | Only in some organic solvents |
| C. | Polar solvents |
| D. | Only in water |
| Answer» B. Only in some organic solvents | |
| 39. |
The heating and cooling of the thermo plastics _________the chemical nature? |
| A. | Alters |
| B. | Do not alters |
| C. | Alters slightly |
| D. | May be alters |
| Answer» C. Alters slightly | |
| 40. |
Thermo plastics becomes ________ on heating. |
| A. | Rigid |
| B. | Moulded |
| C. | Soft |
| D. | Brittle |
| Answer» D. Brittle | |
| 41. |
How many types of plastic resins are there? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 42. |
Plastic resin is used in the paint industry as _________ |
| A. | Catalyst |
| B. | Ion exchanger |
| C. | Inhibitor |
| D. | Coolant |
| Answer» C. Inhibitor | |
| 43. |
The plastics are _________ |
| A. | Semi conductors |
| B. | Conductors |
| C. | Conducts at above room temperature only |
| D. | Insulators |
| Answer» E. | |
| 44. |
The abrasion resistance of the plastic is ____________ |
| A. | Low |
| B. | Very low |
| C. | High |
| D. | Moderate |
| Answer» D. Moderate | |
| 45. |
The fabrication cost is __________ for plastics. |
| A. | High |
| B. | Low |
| C. | Moderate |
| D. | Very high |
| Answer» C. Moderate | |
| 46. |
Plastics are ________ in weight. |
| A. | Very heavy |
| B. | Light |
| C. | Negligible |
| D. | Heavy |
| Answer» C. Negligible | |
| 47. |
Plastics are the materials obtained by mixing the __________ with the other ingredients which impart special engineering properties. |
| A. | Resin |
| B. | Monomer |
| C. | Catalyst |
| D. | Any polymer |
| Answer» B. Monomer | |