CBSE Class 8 Science Synthetic Fibers And Plastics Assignment Set A

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  

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