Which from the following polymers does $NOT$ contain either —$COO$— or —$CONH$— linkage in it?

  • A
    Perspex
  • B
    Polyacrylamide
  • C
    Glyptal
  • D
    Thermocol

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Which of the following is a biodegradable polymer?

Terylene is a

If a plastic is hard,which substance is added to it to introduce the property of softness?

Match the polymers given in column $-I$ with their main applications given in column $-II$.
Column $-I$ Column $-II$
$A$. Bakelite $i$. Unbreakable crockery
$B$. Low density polythene $ii$. Non-stick cookwares
$C$. Melamine-formaldehyde resin $iii$. Packaging material for shock
$D$. Nylon $-6$ $iv$. Electrical switches
$E$. Polytetrafluoroethene $v$. Squeeze bottles
$F$. Polystyrene $vi$. Tyre cords

Which of the following statements about low density polythene is $FALSE$?

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