Question 3 :
<div><span>Telephone instruments, plastic toys, ball point pens, plastic bowls are examples of:</span><br/></div>

Question 7 :
As plastics and synthetic fibers consist of repeating monomer units, they are known as ______ .

Question 18 :
When cellulose from wood or cotton is cooked in large tanks containing caustic soda and then through a narrow slit into another tank containing acid, we get:

Question 22 :
Formation of polyethylene from calcium carbide taken place as follows:<div><br/>$CaC_2+2H_2O\rightarrow Ca(OH)_2+C_2H_2$<br/>$C_2H_2+H_2\rightarrow C_2H_4$<br/>$nC_2H_4\rightarrow (CH_2-CH_2)n$</div><div><br/>The amount of polyethylene obtained from 64.0 kg of $CaC_2$ is:</div>

Question 23 :
Under high pressure and in presence of nickel cyanide catalyst, acetylene on polymerisation gives:

Question 25 :
The addition polymer which is/are co-polymer are:<div><br/>(i) Neoprene<br/>(ii) Buna-N<br/>(iii) Nylon-$66$<br/>(iv) SBR</div>

Question 26 :
Match the column I with column II and mark the appropriate choice.<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>Buna-N</td><td>(i)</td><td>Phthalic acid and ethylene glycol</td></tr><tr><td>(B)</td><td>Nylon-6,6</td><td>(ii)</td><td>Terephthalic acid and ethylene glycol</td></tr><tr><td>(C)</td><td>Dacron<br></td><td>(iii)</td><td>Hexamethylenediamine and adipic acid</td></tr><tr><td>(D)</td><td>Glyptal plastic</td><td>(iv)</td><td>Acrylonitrile and butadiene </td></tr></tbody></table>

Question 28 :
Soft drink and baby feeding bottles are generally made up of:

Question 29 :
The difference in the densities of low-density (LDP) and high-density polymers (HDP) is due to the fact that:

Question 30 :
Which of the following can be remelted time and again without producing any change ?

Question 32 :
Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination respectively are:

Question 33 :
Which one of the following is an example of thermosetting polymers?

Question 34 :
Identify which one is not a homo polymer from the list given below: