Question Text
Question 2 :
<p class="MsoNormal"><span>Ropes of n</span><span>ylon and polyester</span><span> are commonly used in cranes and elevators.</span></p>
Question 8 :
The characteristics of condensation polymerization are given below:<br/>I. only C-C linkages present in the polymer structure<br/>II. use of bifunctional or polyfunctional monomers<br/>III. elimination of a small byproduct molecule<br/><span>Which of the following is true?</span>
Question 11 :
Which of the following is an example of thermosetting polymer ?
Question 14 :
The difference in the densities of low-density (LDP) and high-density polymers (HDP) is due to the fact that:
Question 16 :
Under hydrolytic conditions, the compounds used for preparation of linear polymer and for chain termination respectively are:
Question 17 :
$CH\equiv CH\quad \xrightarrow {X}\quad CH_2=CHCl\quad \xrightarrow Y\quad -(-CH_2-CHCl-\overset {\overset {\text{Cl}}|}{C}H-)_n-$<br>Fill up the blanks with suitable reagents to show synthesis of polyvinyl chloride.
Question 18 :
Which of the following polymers can be made by condensation polymerisation reaction?
Question 19 :
Under high pressure and in presence of nickel cyanide catalyst, acetylene on polymerisation gives: