Name the units of which cellulose polymer is made.
Name the man-made fiber prepared from natural materials.
Name the man-made fibre which is regarded as artificial silk.
Name the fiber obtained by the chemical treatment of the wood pulp (or cellulose).
Name the first fully synthetic fibre.
Name the fiber used for making parachutes and rock climbing ropes.
Which synthetic fiber contains the organic group similar-to those which give fruits their sweet smell.
Which synthetic fiber feels like wool and used as a substitute for wool?
To which kind of synthetic fibers does terylene belong?
State one disadvantage of using synthetic fibres for making clothes.
Name the form of polyester which is replacing materials like glass and used for making bottles and jars.
Name four different plastics.
Give one use of Teflon.
Which of the two is a thermosetting plastic: PVC or bakelite?
Fill in the following blanks with suitable words: (a) Synthetic fibres are also called____or____fibres. (b) Synthetic fibres are made from raw materials called____ (c) Like synthetic fibres, plastic is also a ________ (d) The use of plastics can be reduced by using bags made of ________or ________instead ofpolythene bags.
What is a polymer? Name the natural polymer from which cotton is made.
State the characteristics of Synthetic Fibers.
What is Nylon? State the important properties of nylon.
Give the important uses of Nylon?
What is Polyester? Name a popular polyester.
Arrange the following fibers in the order of increasing strength (keeping the fiber of least strength first):
Nylon, Cotton, Wool, Polyester, Silk
What is PET? State the uses of PET.
What is Acrylic? State one important property of Acrylic.
Write the uses of Acrylic fibers.
Why should we not wear clothes made of Synthetic fibers (like Nylon or Polyester) while working in the kitchen?
What type of shirts should we buy for Summer: Cotton shirts or shirts made from Synthetic materials (like polyester)? Give a reason for your answer.
Explain how manufacturing of Synthetic fibers is actually helping in the conservation of Forests.
What are the Plastics? Name any five commonly used articles made of Plastics.
What are the various types of Plastics? Give two examples of each type of plastics.
Why are thermoplastics not used for making frying panhandles?
Explain why frying pan handles are made of thermosetting plastics?
Why are electric switches, plugs, and sockets made of thermosetting plastics?
Explain the difference between thermoplastics and thermosetting plastics?
Should the handle and bristles of a toothbrush be made of the same type of plastic material? Explain your answer.
Explain why plastic containers are preferred for storing food?
Choose the thermoplastics and thermosetting plastics from the following:
Melamine, Polythene, Bakelite, Polyvinyl Chloride?
State two uses of Polythene?
Write the full form of PVC. Is it thermoplastic or thermosetting plastic?
Write two uses of Bakelite?
State two uses of Melamine?
Give two uses of PVC?
Write some of the uses of plastics in the Healthcare Industry?
Classify the following as biodegradable and non-biodegradable materials:
Woollen clothes, Polythene bags, Paper, Aluminium cans, Toothbrush, Peels of vegetables and fruits, Cotton cloth, Jute bag, Electric switch, Frying panhandle.
State whether plastic is biodegradable or non-biodegradable? Give reasons for your answer?
Explain how the use of plastics has a bad effect on the Environment?
Explain why the disposal of plastic wastes is a major problem. Give two reasons only
What are the various ways to save the environment from excessive Plastic Wastes?
How do carelessly thrown plastic bags (Polythene bags) affect:
(a) Dirty water drains and sewers?
(b) Animals (such as cows)?
What is meant by the 3R’s principle in the context of the use of Plastics?
State the various ways in which we can avoid (or minimize) the use of Plastics?
Facebook
Whatsapp
Copy Link
