Class 8 Science MCQ Synthetic Fibres And Plastics

Question :Which of the following is not biodegradable:
(a) aluminium foil
(b) papers
(c) cow-dung
(d) rotten fruits

Question :Rayon is:
(a) artificial
(b) nylon
(c) artificial nylon
(d) none of these

Question :Polymer present in plants is:
(a) cellulose
(b) nylon
(c) rubber
(d) P.V.C.

Question :Natural substance is:
(a) plastics
(b) cement
(c) glass
(d) wood

Question :Polymer present in wood is:
(a) nylon
(b) cellulose
(c) polythene
(d) rubber

Question :Which of the following garbage is biodegradable:
(a) broken plastics things
(b) fruit peels
(c) cement
(d) iron wastes

Question :Polycot is a mixture of:
(a) polythene and cotton
(b) polyester and cotton
(c) polythene and wool
(d) polyester and wool

Question :Polywool is a mixture of:
(a) polythene and cotton
(b) polyester and cotton
(c) polythene and wool
(d) polyester and wool

Question :A synthetic fibre resembling wool is:
(a) rayon
(b) nylon
(c) acrylic
(d) none of these

Question :Polythene and PVC are examples of
(a) Bio degradable substance
(b) Thermosetting plastics
(c) Thermoplastics
(d) Rayon

Question :Plastics which when moulded once, cannot be softened by heating. Such plastics are called ____
(a) Polythene
(b) Thermoplastics
(c) Polyster
(d) Thermosetting plastics

Question :Fire proof plastic uniform worn by fire fighters has a coating of _____ to make it fire resistant.
(a) Nylon
(b) Rayon
(c) Melamine plastic
(d) Silk

Question :The coating on modern non- stick cookware and electric iron is of
(a) Terrycot
(b) Rayon
(c) Polyester
(d) Teflon

Question : Which of the following is a natural fibre?
(a) Wool
(b) Nylon
(c) PVC
(d) Polythene

Question : Which of the following is a characteristic of plastics?
(a) Electrical conductors
(b) Heat conductors
(c) Biodegradable
(d) Non-biodegradable

Question : Pick The Synthetic Fibre Out Of The Following:
(a) Cotton
(b) Nylon
(c) Jute
(d). Wool

Question : The plastic which cannot be recycled is
(a) jute
(b) rayon
(c) petrochemicals
(d) bakelite

Question : Which of the following are made from thermosetting plastic?
(a) Bottles
(b) Crockery
(c) Shoes
(d) Handbags

Question : Wood pulp is used to make
(a) plastic
(b) wool
(c) jute
(d) rayon

Question : Which of the following once set do not soften on heating:
(a) thermoplastic
(b) thermosetting plastic
(c) polvthene
(d) none of these

Question : Which of the following is natural fibre obtained from plants?
(a) Cotton
(b) Wool
(c) Rayon
(d) Ketone

Question : Which of the following garbage is biodegradable:
(a) broken plastics things
(b) fruit peels
(c) cement
(d) iron wastes

Question : Paheli Is Writing Some Statements. She Wants To Know In Which Of The Following Statements Is Or Are Incorrect?
(a) The fabric terry wool is obtained by mixing terylene and wool.
(b) It is risky to wear synthetic clothes while working in the kitchen.
(c) Most of the plastics are biodegradable.
(d) Synthetic fibres do not melt on heating.

Question : Which of the following is obtained from hair of an animal:
(a) nylon
(b) silk
(c) cotton
(d) wool

Question : Which of the following cannot be recycled:
(a) plastic toys
(b) plastic bowls
(c) plastic covering on electric wires
(d) ball point pens

Question : Polymer present in plants is:
(a) cellulose
(b) nylon
(c) rubber
(d) P.V.C.

Question : Synthetic fibres are:
(a) strong
(b) durable
(c) hining
(d) all of these

Question : A synthetic fibre resembling wool is:
(a) rayon
(b) nylon
(c) acrylic
(d) none of these

Question : Which of the following is natural fibre?
(a) Rayon
(b) Nylon
(c) Polyester
(d) Cotton

Question : Which of the following is used to make non-stick cookwares:
(a) polyester
(b) teflon
(c) rayon
(d) nylon

Question : Polycot Is Obtained By Mixing:
(a) Nylon and wool
(b) Polyester and wool
(c) Nylon and cotton
(d) Polyester and cotton

Question : Which of the following fibre has highest tensile strength?
(a) Cotton
(b) Silk
(c) Rayon
(d) Nylon

Question : PET is form of:
(a) steel
(b) glass
(c) polyester
(d) nylon

Question :A long chain like molecule consisting of a large number of simple small molecules joined to each other by chemical bonds is called polymer.

Question :Silk fibre is obtained from cocoons of the silk moth.

Question :Polyester fibres are used for making hand knit sweaters.

Question :Rayon is made from cellulose obtained from wood pulp.

Question :Plastics are man-made materials.

Question :Acrylic fibres bums with a sooty flame and shrinks to form black beads.

Question :Wool is a natural fibre obtained from plants.

Question :Plastics are non-biodegradable.

Question :We should wear synthetic clothes while working in the kitchen or in a laboratory.

Question :Nylon fibre is used for making nylon parachutes and ropes for rock climbing.

Question :Cotton clothes are more comfortable during hot/humid weather.

Question :Polyester is a synthetic fibrous material.

Question :Plastic is environmental friendly.

Question :Thermoplastics is used for making handles of pressure cooker.

Question :Plastic reacts with air and water.

Question :___________________ has anti-stick property and used as a coating on the surface of frying pan.

Question :Nylon was prepared from ___________________., ___________________ and ___________________ .

Question :Polyester is made up of the repeating units of a chemical called ___________________

Question :Ester have a __________________ smell.

Question :A material which gets decomposed through natural processes, such as action by bacteria, is called ___________________

Question :___________________ is used for making ploythene bags.

Question :Plastics which gets deformed easily on heating and can be bent easily are known as ___________________

Question :Synthetic fibres do not absorb ___________________

Question :A material which is not easily decomposed by natural processes is termed as ___________________

Question :The simplest molecule of a polymer is called ___________________

Question :The 4-R principle is (a) ___________________ (b) ___________________ (c) ___________________ (d) ___________________.

Question :The plastics which when moulded once, can not be softened by heating are called __________________ .

Question :Polywool is a mixture of ___________________ and wool.

Question :___________________ fibre resembles wool.

Question :We should wear ___________________ clothes in the kitchen.

Question :Synthetic fibres are synthesised from raw material called ___________________

Question :On burning, plastics release ___________________ gases.

Question :___________________ fabrics do not wrinkle easily.

Question :Electric plugs are made up ___________________ plastics.

Question :Synthetic fibres are also called ___________________ fibres.

Question :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