Read and download free pdf of CBSE Class 8 Science Synthetic Fibers And Plastics Assignment Set A. Get printable school Assignments for Class 8 Science. Class 8 students should practise questions and answers given here for Chapter 3 Synthetic Fibres And Plastics Science in Class 8 which will help them to strengthen their understanding of all important topics. Students should also download free pdf of Printable Worksheets for Class 8 Science prepared as per the latest books and syllabus issued by NCERT, CBSE, KVS and do problems daily to score better marks in tests and examinations
Assignment for Class 8 Science Chapter 3 Synthetic Fibres And Plastics
Class 8 Science students should refer to the following printable assignment in Pdf for Chapter 3 Synthetic Fibres And Plastics in Class 8. This test paper with questions and answers for Class 8 Science will be very useful for exams and help you to score good marks
Chapter 3 Synthetic Fibres And Plastics Class 8 Science Assignment
CBSE Class 8 Science Synthetic Fibers And Plastics Assignment Set A. Chapter wise assignments are being given by teachers to students to make them understand the chapter concepts. Its extremely critical for all CBSE students to practice all assignments which will help them in gaining better marks in examinations. All assignments available for free download on the website are developed by the best teachers having many years of teaching experience in CBSE schools all over the country. Students, teachers and parents are advised to download the CBSE study material.
EXERCISE-1
SUMMATIVE ASSESSMENTS
Question. Which of the following is a thermoplastic ?
(A) Bakelite
(B) Melamine
(C) Phenol
(D) P.V.C.
Answer.D
Question. Which is used in making of thermocoal ?
(A) Polypropylene
(B) Polyethylene
(C) Polystyrene
(D) High density polyethylene
Answer.C
Question. Which polymer is used in making automobile battery casing ?
(A) High density polyethylene
(B) Polyester
(C) PVC
(D) Poly propylene
Answer.D
Question. Which of the following plastic is a thermosetting plastic ?
(A) Polystyrene
(B) Polyethylene
(C) PVC
(D) Bakelite
Answer.D
Question. Which is used to make disposable cups?
(A) Low density polyethylene
(B) Polypropylene
(C) Polystyrene
(D) PVC
Answer.C
Question. Plastic products are identified by the use of some special numbers. These numbers represent for :-
(A) Electrical conductivity of plastic product
(B) Thermal resistance of plastic product
(C) Durability of plastic product
(D) Recycling of plastic product
Answer.D
Question. Why the waste created by plastics is not friendly with environment ?
(A) Plastics are non biodegradable
(B) Plastics are biodegradable
(C) On burning it causes pollution due to evolution of poisonous gases
(D) A & C both
Answer.D
Question. Disposal of plastic is a major problem becasue :-
(A) It is non biodegradable
(B) It is biodegradable
(C) It takes several years to decompose
(D) A & C both
Answer.D
SELECTION TYPE QUESTIONS
Question. Melamine is a .................. plastic.
Answer.Thermosetting
Question. Like synthetic fibres plastic is also a ..................
Answer.Polymer
Question. A material which gets decomposed through natural processes is called ..................
Answer.Biodegradable
Question. The name of the fire proof plastic is ..................
Answer.Melamine
Question. A special plastic on which oil and water do not stick is ..................
Answer.Teflon
Question. Plastic which gets deformed easily on heating and can be bent easily is ..................
Answer.Thermoplastic
Question. Plastics which when moulded once, can not be softened by heating is ..................
Answer.Thermosetting
Question. Containers which are light weight, lower price, good strength and easy to handling is made up of ..................
Answer.Plastic
Question. .................. material is responsible for the cause of animal death.
Answer.Plastic
Question. Most of the thermoplastics can be ..................
Answer.Recycled
MATCH THE FOLLOWING
Column–A Column–B
(A) Polymer (i) Poly tetra fluoroethylene
(B) Polyethene (ii) Thermosetting plastic
(C) Bakelite (iii) Thermoplastic
(D) Teflon (iv) Biodegradable
(E) Wollen cloth (v) Small units combine to form large single units
Answer.(A) → (v) ; (B) → (iii) ; (C) → (ii) ; (D) → (i) ; (E) → (iv)
EXERCISE-2
Question. South-Indian temples are made of :-
(A) Granite
(B) Sandstone
(C) Limestone
(D) Concrete
Answer.A
Question. Dams on rivers are mostly made by :-
(A) Sandstone
(B) Limestone
(C) Metamorphic rocks
(D) Granite
Answer.D
Question. Red Fort at Delhi and palace of Fatehpur Sikri are made of :-
(A) Granite
(B) Sandstone
(C) Limestone
(D) Concrete
Answer.B
Question. Who discovered cement?
(A) Agassiz
(B) Albertus Magnus
(C) Joseph Aspdin
(D) Janseen
Answer.C
Question. Which of the following is used to build bridges?
(A) Cinder concrete
(B) Sandstone
(C) Limestone
(D) None of these
Answer.A
Question. Which of the following is used to reinforce cement?
(A) Bricks
(B) Stones
(C) Steel rods or bars
(D) Mortar
Answer.C
Question. Photochromic glass contains :-
(A) Silver bromide
(B) Silver iodide
(C) Silver chloride
(D) All of these
Answer.B
Question. Which of the following is used in endoscopy?
(A) Optical fibres
(B) Glass fibres
(C) Glass wool
(D) None of these
Answer.A
Question. Purple-blue coloured glass is obtained by the addition of :-
(A) Chromium salts
(B) Ferrous oxide
(C) Cobalt salts
(D) None of these
Answer.C
Question. Terra cotta is :-
(A) Kaolin
(B) Clay
(C) Unglazed primitive pottery
(D) Porcelain
Answer.C
Question. Porcelain is made from :-
(A) Clay
(B) Kaolin
(C) Quartz
(D) White clay
Answer.D
Question. Which of the following is a natural polymer?
(A) Cellulose
(B) Nylon
(C) Polythene
(D) PVC
Answer.A
Question. Which of the following have long-chains of protein?
(A) Jute
(B) Cotton
(C) Silk and wool
(D) All of these
Answer.C
Question. Thermocole is made from
(A) Polythene
(B) Polystyrene
(C) Perspex
(D) Teflon
Answer.B
Question. Which of the following is thermoplastics?
(A) Polythene
(B) Bakelite
(C) Both of these
(D) None of these
Answer.A
Question. Contact lenses are made from :-
(A) Polyvinyl chloride
(B) Polystyrene
(C) Lucite
(D) Teflon
Answer.C
Question. Which of the following is used as non-stick coating for cooking utensils?
(A) Perspex
(B) Styrofoam
(C) Polystyrene
(D) Teflon
Answer.D
Question. Which of the following are thermosets?
(A) Formica and Melamine
(B) Polystyrene
(C) Polythene
(D) Thermocole
Answer.S
Question.Which of the following is similar to cotton?
(A) Nylon
(B) Dacron
(C) Rayon
(D) Terylene
Answer.C
Question. Which of the following do not soften upon heating?
(A) Lucite
(B) Bakelite
(C) Polystyrene
(D) Polythene
Answer.B
Question. Which of the following does not produce insoluble carbonates in hard water?
(A) Soap
(B) Detergent
(C) Both of these
(D) None of these
Answer.B
Question. Which of the following is alkaline in nature?
(A) Soap
(B) Detergent
(C) Both of these
(D) None of these
Answer.B
Question. Which of the following is the basic constituent of Nitrogenous fertilizers?
(A) Amide
(B) Ammonia
(C) Sulphuric acid
(D) Hydrochloric acid
Answer.B
Question. Heptachlor is :-
(A) Fungicide
(B) Weedicide
(C) Insecticide
(D) All of these
Answer.C
Question. Which of the following pesticide is banned in some contries?
(A) DDT
(B) Dieldrin
(C) Chlordane
(D) Parathion
Answer.A
Question. The correct order of increasing size of particles is :-
(A) Sand, silt, clay
(B) Clay, sand, silt
(C) Clay, silt, sand
(D) Sand, clay, silt
Answer.C
EXERCISE-3
Question. Explain why some fibres are called synthetic.
Answer. Some fibres are called synthetic because they are made by human beings.
Question. Marks (√ ) the correct answer :
Rayon is different from synthetic fibres because.
(a) It has a silk like appearance
(b) It is obtained from wood pulp
(c) Its fibres can also be woven like those of natural fibres.
Answer. (b) It is obtained from wood pulp.
Question. Fill in the blanks with appropriate words :
(a) Synthetic fibres are also called ......... or ......... fibres.
Answer. Artificial, man-made.
(b) Synthetic fibres are synthesised from raw material called ......... .
Answer. Petrochemicals
(c) Like synthetic fibres, plastic is also a ......... .
Answer. Polymer
Question. Give examples which indicate that nylon fibres are very strong.
Answer. Parachutes and ropes for rock climbing.
Question. Explain why plastic containers are favoured for storing food.
Answer. Three main advantages of using plastic containers for storing food are :
(i) They do not react with food items.
(ii) They do not get rusted.
(iii) They are light, strong and durable.
Question. Explain the difference between thermoplastic and thermosetting plastics.
Answer. Thermoplastics can be softened by heating and can be bent easily whereas thermosetting plastic cannot be softened by heating and break when forced to bend.
Question. Explain why the following are made of thermosetting plastics.
(a) Saucepan handles
(b) Electric plugs/switches/plug boards.
Answer. Above articles are made up of bakelite (a thermosetting plastic) because it is –
(a) Poor conductor of electricity
(b) Heat resistant.
Question. Categories the materials of the following products into 'can be recycled' and 'cannot be recycled' :
Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches.
Answer.
Can be recycled Cannot be recycled
Toys, carry bags, p lastic bowls, Telep hone instruments, cooker handles,
electric wire, covering , p lastic chairs ball p oint p ens, electrical switches.
Question. Rana wants to but shirts for summer. Should he buy cotton shirts or shirts made from synthetic material? Advise Rana, giving your reason.
Answer. Synthetic fabric soaks less water than cotton fabric. In summers we have extensive sweating which must be soaked up by our clothings. Since synthetic fabric is poor in this property we prefer cotton clothes in summers.
Question. Give examples to show that plastics are noncorrosive in nature.
Answer. (i) It does not react with the chemical or other items stored in the containers made of it.
(ii) It does not get rusted when exposed to moisture and air.
(iii) It does not decompose when left in open for a long period.
Question. Should the handle and bristles of a toothbrush be made of the same material? Explain your Answer.
Answer. Handle and bristles of a toothbrush should be made of different materials because they have different uses and require different properties in the material e.g., bristles should be much more flexible than the handle.
Question. 'Avoid plastics as far as possible.' Comment on this advice.
Answer. Since plastic takes several years to decompose, it is not environment friendly. It causes environmental pollution.Besides, when the synthetic material is burnt it takes a long time to get completely burnt. In the process it releases a lot of poisonous fumes into the atmosphere causing air pollution.
Question. Match the terms of Column A correctly with the phrases given in Column B.
A B
(i) Polyester (a) Prepared by using wood pulp
(ii) Teflon (b) Used for making parachutes and stockings
(iii) Rayon (c) Used to make non-stick cookwares
(iv) Nylon (d) Fabrics do not wrinkle easily
Answer. A B
(i) Polyester (d) Fabrics do not wrinkle easily
(ii) Teflon (c) Used to make non-stick cookwares
(iii) Rayon (a) Prepared by using wood pulp
(iv) Nylon (b) Used for making parachutes and stockings
Question. 'Manufacturing synthetic fibres is actually helping conservation of forests.' Comment.
Answer. In the manufacturing of synthetic fibres we use no material from natural sources thus in turn we conserve forests which may otherwise been destroyed. When we use articles made of plastics we also save thousands of trees which otherwise have to be cut if we used articles made of wood or natural fibres.
Question. Describe an activity to show that thermoplastic is a poor conductor of electricity.
Answer. A thermoplastic (or plastic) is poor conductor of electricity. It can be shown by using a plastic wire as a connecting wire in a circuit. In this condition the bulb will not glow.
More Questions
1.The first fully man made fiber was:
(A) Polyester.
(B) Acrylic.
(C) Rayon.
(D) Nylon.
2.Rayon is obtained by chemical treatment of
(A) Paper
(B) Wood pulp
(C) Fruit pulp
(D) Any of these
3.Which of the following is not a synthetic fiber?
(A) Nylon
(B) Acrylic
(C) Rayon
(D) Cotton
4.Which of the following is a polyester fiber
(A) Rayon.
(B) Terelene.
(C) Nylon.
(D) Acrylic.
5.Synthetic fiber which resembles with wool is:
(A) Nylon.
(B) Polycot.
(C) Polytester.
(D) Acrylic.
6.Which of the following is/are a man-made fiber?
(A) Acrylic.
(B) Nylon.
(C) Rayon.
(D) All of these.
7.The synthetic fiber also known as artificial silk:
(A) Rayon.
(B) Acrylic.
(C) Nylon.
(D) PET.
8.Parachutes and ropes for climbing mountain are made of:
(A) Rayon.
(B) Polyester.
(C) Acrylic.
(D) Nylon.
9.Which of the following is non-biodegradable?
(A) Paper.
(B) Wood.
(C) Tin can.
(D)Woolen clothes.
10.Cotton is polymer of :
(A) Fructose.
(B) Cellulose.
(C) Maltose.
(D) Sucrose.
Please click the below link to access CBSE Class 8 Science Synthetic Fibers And Plastics Assignment Set A
CBSE Class 8 Science Conservation Of Plants And Animals Assignment Set A |
CBSE Class 8 Science Conservation Of Plants And Animals Assignment Set B |
CBSE Class 8 Science Sound Assignment Set A |
CBSE Class 8 Science Sound Assignment Set B |
CBSE Class 8 Science Sound Assignment Set C |
More Study Material
CBSE Class 8 Science Chapter 3 Synthetic Fibres And Plastics Assignment
We hope you liked the above assignment for Chapter 3 Synthetic Fibres And Plastics which has been designed as per the latest syllabus for Class 8 Science released by CBSE. Students of Class 8 should download and practice the above Assignments for Class 8 Science regularly. We have provided all types of questions like MCQs, short answer questions, objective questions and long answer questions in the Class 8 Science practice sheet in Pdf. All questions have been designed for Science by looking into the pattern of problems asked in previous year examinations.
Assignment for Science CBSE Class 8 Chapter 3 Synthetic Fibres And Plastics
Our team of expert teachers have referred to NCERT book for Class 8 Science to design the Science Class 8 Assignments. If you practice at least one test paper daily, you will get higher marks in Class 8 exams this year. Daily practice of Science course notes and related study material will help you to clear all your doubts and have stronger understanding of all concepts. You can download all Revision notes for Class 8 Science also from www.studiestoday.com absolutely free of cost.
Chapter 3 Synthetic Fibres And Plastics Assignment Science CBSE Class 8
All questions and their answers for the assignment given above for Class 8 Science have been developed as per the latest curriculum and books issued for the current academic year. The students of Class 8 can rest assured that the best teachers have designed the questions of Science so that you are able to revise the entire syllabus if you do the assignments. Lot of MCQ questions for Class 8 Science have also been given in the worksheets and assignments for regular use. All study material for Class 8 Science students have been given on studiestoday.
Chapter 3 Synthetic Fibres And Plastics Assignment CBSE Class 8 Science
Regular assignment practice helps to get a more comprehensive understanding of Chapter 3 Synthetic Fibres And Plastics concepts. Assignments play a crucial role in understanding Chapter 3 Synthetic Fibres And Plastics in CBSE Class 8. Students can download all the assignments of the same chapter in Class 8 Science in Pdf format. You can print them or read them online on your computer or mobile.
CBSE Science Class 8 Chapter 3 Synthetic Fibres And Plastics Assignment
CBSE Class 8 Science latest books have been used for coming up with the latest questions and solutions for the above assignment. If you have revised all concepts relating to Chapter 3 Synthetic Fibres And Plastics then you should attempt all questions given in the test sheets above. We have also provided lot of Worksheets for Class 8 Science which you can use to further make your self stronger in Science
You can download free Pdf assignments for CBSE Class 8 Science Chapter 3 Synthetic Fibres And Plastics from StudiesToday.com
The Chapter 3 Synthetic Fibres And Plastics Class 8 Science Assignments have been designed based on latest CBSE syllabus for Class 8 Science issued for the current academic year
Yes, These printable assignments for Chapter 3 Synthetic Fibres And Plastics Class 8 Science are free to download and print
All topics given in Chapter 3 Synthetic Fibres And Plastics Science Class 8 Book for the current academic year have been covered in the given assignment
No, all Printable Assignments for Chapter 3 Synthetic Fibres And Plastics Class 8 Science have been given for free and can be downloaded in Pdf format
Just click on the View or Download button below, then another window with the Pdf will be visible, just click on the Pdf icon to download the free assignments for Chapter 3 Synthetic Fibres And Plastics Class 8 Science
Yes, apart from Science you can download free assignments for all subjects in Class 8
Our team of expert teachers at studiestoday.com have provided all answers for the practice questions which have been given in Class 8 Science Chapter 3 Synthetic Fibres And Plastics assignments