Class XII

Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide?
  1. Tertiary butyl chloride
  2. Neopentane
  3. Isohexane
  4. Neohexane
Painting material among the following is
  1. Polyvinyl chloride
  2. Polystyrene
  3. Polypropene
  4. Glyptal
The commercial name of polyacrylonitrile is ______________.
  1. Orlon (acrilan)
  2. PVC
  3. Bakelite
  4. Dacron
For macromolecules to form, one more of the following criteria are essential
  1. the molecules in C are linked to each other by covalent bonds
  2. All of these
  3. by joining of repeating structural units on a large scale
  4. The repeating structural units are derived from some simple and reactive molecules
One of the following is a fibre.
  1. polythene
  2. polyamide
  3. polystyrene
  4. polyvinyl
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