8th Class Science Synthetic Fibers and Plastics Question Bank

done Synthetic Fibres and Plastics Total Questions - 35

• question_answer1)
  From which part of sheep is wool made from?
  A)
  Skin                             done clear
  B)
                         Toes        done clear
  C)
                         Fleece       done clear
  D)
                         All of the above      done clear
  View Solution play_arrow

• question_answer2)
  What is the process of taking out silk threads from the cocoon known as?
  A)
  Rearing                        done clear
  B)
                         Sorting       done clear
  C)
                         Scouring                      done clear
  D)
                         Reeling       done clear
  View Solution play_arrow

• question_answer3)
  What do silk fibres consist of?
  A)
  Vitamins                      done clear
  B)
                         Carbohydrates       done clear
  C)
                         Proteins                       done clear
  D)
                         Fats done clear
  View Solution play_arrow

• question_answer4)
  Which of these provide compounds necessary to prepare nylon?

  (I) Coal

  (ii) Air

  (iii) Water

  A)
  Only (i) done clear
  B)
                         Only (i) and (ii) done clear
  C)
                         Only (i) and (iii) done clear
  D)
                         (i), (ii) and (iii) done clear
  View Solution play_arrow

• question_answer5)
  Why is nylon useful?
  A)
  It is soft, strong and light. done clear
  B)
                         It is transparent, light and easy to wash. done clear
  C)
                         It is strong, elastic and light. done clear
  D)
                         It is soft, inexpensive and strong. done clear
  View Solution play_arrow

• question_answer6)
  Which of the following statements is NOT true?
  A)
  Fabric is made of yarn. done clear
  B)
                         Jute is the outer covering of the coconut. done clear
  C)
                         Polyester is a synthetic fibre. done clear
  D)
                         Silk fibre is obtained from silk worms. done clear
  View Solution play_arrow

• question_answer7)
  Fruits have characteristic smells. Which of these chemicals is responsible for it?
  A)
  Yeast                           done clear
  B)
                         Alcohol done clear
  C)
                         Cellulose                      done clear
  D)
                         Esters done clear
  View Solution play_arrow

• question_answer8)
  Which of the following articles is made by using only man-made substances?
  A)
                                                       done clear
  B)
                         done clear
  C)
                                        done clear
  D)
                         done clear
  View Solution play_arrow

• question_answer9)
  Which of the following is made from coconut fibre?
  A)
  Sweaters                      done clear
  B)
                         Shoes               done clear
  C)
                         Mattresses                    done clear
  D)
                         Sarees done clear
  View Solution play_arrow

• question_answer10)
  Which of the following statements is NOT true?
  A)
  Polymers occur in nature. done clear
  B)
                         Nylon is used in the making of parachutes. done clear
  C)
                         Cellulose is made up of glucose units. done clear
  D)
                         Nylon thread is weaker than cotton thread. done clear
  View Solution play_arrow

• question_answer11)
  PVC is an example of
  A)
  plastic. done clear
  B)
                         thermoplastic. done clear
  C)
                         thermosetting plastic. done clear
  D)
                         acrylic. done clear
  View Solution play_arrow

• question_answer12)
  Which of the following properties of plastic makes it most convenient for use?                              
  A)
  It is non-reactive.                  done clear
  B)
                         It is light, strong and durable.      done clear
  C)
                         It is easily remouldable.        done clear
  D)
                               All of the above                  done clear
  View Solution play_arrow

• question_answer13)
  Which of the given materials is used to prepare synthetic fibres like polyester and acrylic?
  A)
  Wood pulp       done clear
  B)
                         Coconut fibres done clear
  C)
                         Petrochemicals            done clear
  D)
                         Paper pulp done clear
  View Solution play_arrow

• question_answer14)
  Match the entries in Column I with those in Column II.

  	Column - I		Column - II
  (a)	Silk	(i)	Rope
  (b)	Nylon	(ii)	Sweater
  (c)	Acrylic	(iii)	Bottle
  (d)	Plastic	(iv)	Saree

  A)
  a-1, b-3, c-4, d-2         done clear
  B)
                         a-2, b-4, c-3, d-1         done clear
  C)
                         a-3, b-1, c-4, d-2         done clear
  D)
                         a-4, b-1, c-2, d-3 done clear
  View Solution play_arrow

• question_answer15)
  Which of the following is non- biodegradable?
  A)
  Plastic                          done clear
  B)
                         Cotton             done clear
  C)
                         Paper                           done clear
  D)
                         Left-over food  done clear
  View Solution play_arrow

• question_answer16)
  By which of these processes is polythene produced?
  A)
  Isomerization   done clear
  B)
                         Polymerization done clear
  C)
                         Hydrogenation             done clear
  D)
                         All of the above            done clear
  View Solution play_arrow

• question_answer17)
  Which of the following plastic products can be remoulded?
  A)
  Bakelite                        done clear
  B)
                         Melamine                     done clear
  C)
                         Polythene                     done clear
  D)
                         Polycot done clear
  View Solution play_arrow

• question_answer18)
  Which of the following products cannot be decomposed easily?
  A)
  Acrylic                         done clear
  B)
                         Polythene         done clear
  C)
                         Plastic                          done clear
  D)
                         All of the above done clear
  View Solution play_arrow

• question_answer19)
  Why is plastic coated with melamine?
  A)
  It becomes a good conductor of heat. done clear
  B)
                         It becomes strong and flexible. done clear
  C)
                         It becomes a fire proof plastic. done clear
  D)
                         It is remouldable. done clear
  View Solution play_arrow

• question_answer20)
  Which of the following is used for making terylene fibres?
  A)
  Wood pulp                   done clear
  B)
                         Esters               done clear
  C)
                         Acrylic                         done clear
  D)
                         Paper pulp                   done clear
  View Solution play_arrow

• question_answer21)
  To which of the following does the 4R principle apply the most?
  A)
  Synthetic fibre done clear
  B)
                         Natural fibre                done clear
  C)
                         Metal                            done clear
  D)
                         Plastic done clear
  View Solution play_arrow

• question_answer22)
  Which of the following statements is NOT true?
  A)
  Thermosetting plastics are bad conductors of heat and electricity. done clear
  B)
                         Thermoplastics are good conductors of heat and electricity. done clear
  C)
                         Plastics do not get corroded easily. done clear
  D)
                         Plastic is also a polymer. done clear
  View Solution play_arrow

• question_answer23)
  Which of the following is a property of thermo setting plastic?
  A)
  Flame resistant done clear
  B)
                         Non-corrosive done clear
  C)
                         Mouldable done clear
  D)
                         All of the above done clear
  View Solution play_arrow

• question_answer24)
  Which of the following is NOT a natural polymer?
  A)
  Natural rubber             done clear
  B)
                         Polyester          done clear
  C)
                         Protein                         done clear
  D)
                         Starch done clear
  View Solution play_arrow

• question_answer25)
  Which of the following fabrics is made by mixing two types of fibres?
  A)
  Cotton                         done clear
  B)
                         Polywool          done clear
  C)
                         Rayon                          done clear
  D)
                         Nylon done clear
  View Solution play_arrow

• question_answer26)
  Which of the following is purely a synthetic fibre?
  A)
  Rayon                          done clear
  B)
                         Nylon   done clear
  C)
                         Cotton                         done clear
  D)
                         Flax done clear
  View Solution play_arrow

• question_answer27)
  Which of the following differences regarding thermoplastics and thermo- setts is/are true?

  	Thermoplastics	Thermosets
  (i)	Soft	Hard
  (ii)	Can withstand heat	Cannot withstand heat
  (iii)	No cross linkages	Cross linkages are present

  A)
  Only (i) done clear
  B)
                         Only (i) and (ii) done clear
  C)
                         Only (i) and (iii) done clear
  D)
                         (i),(ii) and (iii) done clear
  View Solution play_arrow

• question_answer28)
  Which of the following properties of nylon are most convenient for its use?
  A)
  It is soft, strong and heavy. done clear
  B)
                         It is strong, elastic and light. done clear
  C)
                         It is soft, inexpensive and strong. done clear
  D)
                         It is expensive, soft and light. done clear
  View Solution play_arrow

• question_answer29)
  Which of the following is an example of a heavily cross linked polymer?
  A)
  Melamine         done clear
  B)
                         Polythene                     done clear
  C)
                         Nylon                           done clear
  D)
                         Polyester done clear
  View Solution play_arrow

• question_answer30)
  How does the burning of synthetic polymers such as plastic pollute the environment?
  A)
  By releasing smoke and toxic gases done clear
  B)
                         By releasing water vapour and haze done clear
  C)
                         By releasing water vapour and smoke done clear
  D)
                         By forming smog and rain done clear
  View Solution play_arrow

• question_answer31)
  Which of the following is a property of thermoplastics?
  A)
  They do not bend. done clear
  B)
                         They do not get deformed easily. done clear
  C)
                         They are resistant to most of the chemicals. done clear
  D)
                         They are made up of long polymer chains with strong bonds. done clear
  View Solution play_arrow

• question_answer32)
  Which of these clothes dry faster in rainy season?
  A)
  Cotton                         done clear
  B)
                         Wool                done clear
  C)
                         Polyester          done clear
  D)
                         Silk                  done clear
  View Solution play_arrow

• question_answer33)
  I Which of these clothes should you wear while cooking in the kitchen?
  A)
  Rayon                          done clear
  B)
                         Cotton done clear
  C)
                         Polyester          done clear
  D)
                         Polycot done clear
  View Solution play_arrow

• question_answer34)
  By what name is artificial (man-made) wool known as?
  A)
  Rayon                          done clear
  B)
                         Acrylic             done clear
  C)
                         Polycot                         done clear
  D)
                         Polyester done clear
  View Solution play_arrow

• question_answer35)
  What is the best method to avoid pollution by using plastic bags?
  A)
  Burying the plastic bags in the soil. done clear
  B)
                         Using bags made of biodegradable material. done clear
  C)
                         Throwing the plastic bags into the river. done clear
  D)
                         Burning the plastic bags in a rubbish dump. done clear
  View Solution play_arrow