The ‘mercerised cellulose’ is chemically prepared by

If the number average molecular weight and weight average molecular weight of a polymer are $40000$ and $60000$ respectively, the polydispersity index of the polymer will be

Nylon-$66$ is

Identify the monomers used in the manufacture of glyptal $(X)$, dacron $(Y)$ and nylon $2$-nylon $6$ $(Z)$.

Match the following:

List-$I$ (Polymer)	List-$II$ (Used in Making)
$A$. Urea-formaldehyde resin	$I$. Safety Helmets
$B$. Glyptal	$II$. Gaskets
$C$. Bakelite	$III$. Laminated sheets
$D$. Nylon-$6,6$	$IV$. Commercial fibres
$E$. Phenol-formaldehyde	$V$. Paints

Correct answer is:

What is polythene? Write down its properties and types. Explain the preparation,properties,and uses of different types of polythene.