Question 2 :
The fibre used in parachute making and ropes for rope climbing is__________.
Question 3 :
Which of the following are uses of plastics in health care industry?
Question 5 :
The fibre developed in New York & London simultaneously is :
Question 10 :
Which of the following statement is true about PVC (polyvinyl chloride) and polythene<span>?</span>
Question 21 :
Which of the following is not a common property of plastics?<br>
Question 22 :
Which among the following plastic does not belong to either thermoplastic or thermosetting?
Question 27 :
Which of the following material is not used in making plate?<br/>
Question 28 :
Which of the following fiber can be drawn into very fine fibers that can be woven like any other yarn? <br/>
Question 31 : <div><span>Fill in the blanks by suitable words to make correct statements:</span><br/></div>_______ is an artificial fibre resembling silk.
Question 32 : Match column I with Column II and choose the correct option using the codes given below.<br/><table class="wysiwyg-table"><tbody><tr><td></td><td>column I</td><td></td><td>Column II</td></tr><tr><td>(a)</td><td>A fibre  which wrinkleproof</td><td>(i)</td><td>Melamine</td></tr><tr><td>(b)</td><td>A fibre called artificial silk</td><td>(ii)</td><td>Acrylic</td></tr><tr><td>(c)</td><td>Fibre is known as artificial wool</td><td>(iii)</td><td>Rayon</td></tr><tr><td>(d)</td><td>A fire-proof plastic</td><td>(iv)</td><td>Nylon</td></tr></tbody></table>
Question 38 :
Electrical wires have a coating of an insulated material. The material generally used is:
Question 39 :
Which among the following is not the example of natural polymer?
Question 41 :
Materials which are not obtained from plants and animals are called :
Question 42 :
Padma observes that screwdrivers have a plastic handle and electrical wires have a plastic covering. What is the reason for the use of plastic in electric appliances?
Question 51 :
Fabric made from which of the fibre does not get wrinkled easily?<br>
Question 52 :
A person has to make electric switches and plugs. Which material is recommended ?
Question 54 :
Which of the following can absorb over 90% of its own mass of water and also does not stick to wounds?
Question 59 : Match the column I with Column II and choose the correct option using the codes given below.<br><table class="wysiwyg-table"><tbody><tr><td></td><td>column I</td><td></td><td>Column II</td></tr><tr><td>(a)</td><td>A fibre obtained by chemical treatment of wood pulp</td><td>(i)</td><td>Melamine</td></tr><tr><td>(b)</td><td>A fibre stronger than steel wire</td><td>(ii)</td><td>Acrylic</td></tr><tr><td>(c)</td><td>A fibre known as artificial wool</td><td>(iii)</td><td>Rayon</td></tr><tr><td>(d)</td><td>A fire-proof plastic</td><td>(iv)</td><td>Nylon</td></tr></tbody></table>
Question 62 :
Which of the following are the advantages of plastic over metals?<br/>1. Plastics are lighter.<br/>2. Plastics are usually cheaper.<br/>3. Plastics are inert to both acids and alkalis.<br/>
Question 69 :
A person should not wear polyester clothes while cooking in the kitchen because:
Question 71 :
Acrylic, a man made fibre is a good substitute of a natural fibre. Which is this natural fibre?
Question 73 :
If the plastics are hard, become soft and readily workable by the addition of certain compounds called:
Question 76 :
Which of the following properties of synthetic plastic makes it the most convenient to use?
Question 77 :
Match the following with the correct answers.<br/>(a) Scouring                 (i) Yields silk fibers<br/>(b) Mulberry leaves    (ii) Cleaning sheared skin <br/>(c) Sheep                    (iii) Food of silk worm.<br/>(d) Cocoon                 (iv) Wool yielding animal. 
Question 86 :
<span>For which of the following purposes is a coating of melamine plastic used?</span>
Question 88 :
The most suitable material for the preparation of handles of cooking utensils is
