Artificial silk is

Match List-$I$ with List-$II$:

List-$I$ (Polymer)	List-$II$ (Used in)
$A$. Bakelite	$I$. Radio and television cabinets
$B$. Glyptal	$II$. Electrical switches
$C$. $PVC$	$III$. Paints and lacquers
$D$. Polystyrene	$IV$. Water pipes

Choose the correct answer from the options given below:

The name 'nylon' is associated with the discovery of the polymer in which two cities?

The correctly matched set of the following is:

The mass average molecular mass and number average molecular mass of a polymer are respectively $40,000$ and $30,000$. The polydispersity index of the polymer will be:

Which of the following organic compounds polymerizes to form the polyester dacron?