Multiple choice

Select the incorrect statement(s) among the following:

  1. In the vulcanization of rubber, a solution of S2Cl2 in CO2 is used.
  2. Buna-N is copolymer of butadiene and acrylonitrile.
  3. Cellulose mononitrate is commercially called as celluloid, used in photographic films.

  1. Only 1

  2. Only 2

  3. Only 3

  4. 1 and 2

  5. 2 and 3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

1) Vulcanization is a chemical process for converting natural rubber or related polymers into more durable materials via the addition of sulphur or a solution of S2Cl2 in CS2. 2) Buna-N is the copolymer of butadiene and acrylonitrile. 3) Cellulose is treated with sulfuric acid and potassium nitrate to give cellulose mononitrate. This was used commercially as celluloid, a highly flammable plastic used in the first half of the 20th Century for lacquers and photographic film. Hence, the statement 1 is incorrect.

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