Polymer Engineering MCQ

Test your knowledge with important Polymer Engineering MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Polymer Engineering MCQs at Bissoy

• Which of the following polymer continues to burn even on the removal from flame?
  ক

  chlorinated rubber

  খ

  poly vinyl chloride

  গ

  butyl rubber

  ঘ

  nylons
• What is the colour of flame when chlorinated rubber is heated?
  ক

  blue

  খ

  blue green

  গ

  yellow

  ঘ

  yellow green
• Polymers of type A produce yellow smoky flame on heating with an unpleasant and sweet smell. They also melt or char giving acidic distillate and black residue. Which of the following could be A?
  ক

  polyisoprenes

  খ

  polyesters

  গ

  nylons

  ঘ

  ethyl cellulose
• Which of the following polymer produces an odour resembling burning paraffin wax on heating?
  ক

  polyethylene

  খ

  polyesters

  গ

  cellulose

  ঘ

  butyl rubber
• Which of the following polymers do not produce black residue on heating?
  ক

  chlorinated rubber

  খ

  poly (vinyl alcohol)

  গ

  poly (vinyl chloride)

  ঘ

  none of the mentioned
• Which of the following polymers does not produce a smoky flame?
  ক

  polybutadiene rubber

  খ

  gutta percha

  গ

  poly (vinyl acetate)

  ঘ

  polysulphide rubber
• Which of the following polymer produces camphor like odour on heating?
  ক

  ethyl cellulose

  খ

  cellulose nitrate

  গ

  polyacrylonitrile

  ঘ

  cellulose acetate
• A polymer X produces a pale yellow flame with light blue-green edge on heating. It produces a fish like odour and is alkaline in nature. Which of the following polymer represents X?
  ক

  phenol formaldehyde resin

  খ

  melamine formaldehyde resin

  গ

  nylons

  ঘ

  butyl rubber
• Which of the following polymer does not produce yellow flame on heating?
  ক

  phenol-formaldehyde resin

  খ

  nylons

  গ

  cellulose

  ঘ

  nitrile rubber
• A sample of polystyrene is warmed under reflux in concentrated nitric acid and the clear mixture is poured in water to yield a X coloured precipitate. This precipitate is then extracted with ether and then with NaOH solution followed by washing with water in each extraction. The nitro compounds from the combined final aqueous extract and alkaline extract using concentrated HCl and zinc. The final solution after being diazotized and then cooled is poured into excess of alkaline naphthol to give Y coloured solution. What are the colours X and Y?
  ক

  pale yellow and deep red

  খ

  deep blue and deep brown

  গ

  deep red and light pink

  ঘ

  light yellow and brown
• What colour is obtained when polyvinyl acetate is brought in contact with iodine solution?
  ক

  brown

  খ

  blue

  গ

  yellow

  ঘ

  black
• A small volume of iodine solution when added to acidic solution of polymer X produced a blue colour immediately. An addition of pinch of borax resulted the same. Which of the following could be X?
  ক

  polyvinyl acetate

  খ

  polyvinyl alcohol

  গ

  polyvinyl chloride

  ঘ

  polyvinylidene chloride
• What colour is developed when polyvinylidene chloride is immersed in morpholine?
  ক

  dark blue

  খ

  light yellow

  গ

  brown

  ঘ

  purple
• Which polymer gives dark brown precipitate when its pyridine solution is heated in the presence of alcoholic NaOH solution?
  ক

  polyvinylidene chloride

  খ

  polyvinyl chloride

  গ

  polyvinyl alcohol

  ঘ

  all of the mentioned
• What colour change is observed when few drops of alcoholic NaOH is added to polyvinyl chloride solution?
  ক

  colourless to red

  খ

  colourless to yellow

  গ

  colourless to blue

  ঘ

  colourless to grey
• Which of the following polymer will not give grey colour when their pyrolytic vapours are tested with a strip of filter paper soaked in saturated solution of o- nitrobenzaldehyde in dilute NaOH?
  ক

  Nylon 6

  খ

  Nylon 66

  গ

  Nylon 12

  ঘ

  Nylon 11
• What colour is obtained when a strip of filter paper soaked in saturated solution of o-nitrobenzaldehyde in dilute NaOH is held over the prylotic vapours of Nylon 6,6?
  ক

  grey

  খ

  black

  গ

  red

  ঘ

  yellow
• A strip of cupric acid paper, freshly moistened with a dilute solution of benzidine in dilute acetic acid is held in the pyrolytic vapours of polymer A and a bright blue colouration is obtained. Which of the following could be polymer A?
  ক

  polyamide

  খ

  polyacryonitrile

  গ

  butyl rubber

  ঘ

  polyvinyl formal
• What colour is obtained if condensed pyrolyzate of polyacrylonitrile is made alkaline and boiled with ferrous sulphate followed by acidification?
  ক

  ruby-red

  খ

  prussian blue

  গ

  bright blue

  ঘ

  red-brown
• The aqeous extracts of some polymers when tested with chomotropic solution followed by addition of sulphuric acid and then heating to nearly 100 C gave dark violet colour. Which of the following cannot respond to this test?
  ক

  polyvinyl formal

  খ

  polyoxymethylenes

  গ

  urea-formaldehyde resisns

  ঘ

  polyacrylonitrile
• What colour is obtained when a drop of diphenylamine solution in concentrated sulphuric acid is added to the sample of cellulose nitrate in the absence of other oxidizing agents?
  ক

  deep blue

  খ

  yellow

  গ

  grey

  ঘ

  red
• Which of the following do not respond to the Molisch test for carbohydrates?
  ক

  cellulose acetate

  খ

  viscose rayon

  গ

  cellulose nitrate

  ঘ

  none of the mentioned
• What colour is obtained by the pyrolytic vapours of butyl rubber on the filter paper freshly soaked in a solution obtained by dissolving yellow mercuric oxide in conc. sulphuric acid and water on boiling?
  ক

  bright yellow

  খ

  grey

  গ

  blue

  ঘ

  brown-yellow
• Which of the following rubbers turn the filter paper in ethereal solution containing p-dimethylamino benzaldehyde and hydroquinone and then moistened with a 30% solution of trichloroacetic acid in isopropanol grey with a yellow tinge?
  ক

  natural rubber

  খ

  silicones

  গ

  polychloroprenes

  ঘ

  butyl rubbers
• A strip of filter paper dissolved in ethereal solution containing p-dimethylamino benzaldehyde and hydroquinone and then moistened with a 30% solution of trichloroacetic acid in isopropanol produces blue-violet colour in the presence of pyrolytic vapours of rubbers A and B. Which of the following pair represent rubbers A and B?
  ক

  natural rubber and butyl rubber

  খ

  styrene butadiene rubber and silicone rubber

  গ

  styrene butadiene rubber and natural rubber

  ঘ

  natural rubber and nitrile butadiene rubber
• Which of the following rubber do not respond to trichloroacetic acid?
  ক

  isomerized rubber

  খ

  chlorinated rubber

  গ

  polysulphide rubber

  ঘ

  butyl rubber
• Which of the following rubbers when treated with trichloroacetic acid give pink-mauve melt and on dilution give grey-mauve precipitate?
  ক

  isomerized rubber

  খ

  acetone-extracted NR

  গ

  gutta percha

  ঘ

  all of the mentioned
• Polysulphide rubbers when treated with trichloroacetic acid imparted colour X, which turned to colour Ysolution on boiling and then colour Z precipitate on dilution. Which set of colours represent X, Y, Z, respectively?
  ক

  pink, red-brown, grey

  খ

  pink, ruby-red, rose-pink

  গ

  pink, red-brown, yellow

  ঘ

  pink, ruby-red, yellow
• Which of the following does not give positive weber test of rubbers?
  ক

  natural rubber

  খ

  butyl rubber

  গ

  polyisoprene rubber

  ঘ

  styrene butadiene rubber
• A rubber polymer sample A is reacted with chromic acid solution and yields acetic acid solution. Compound A also gives positive Weber test. Which of the following is possibly A?
  ক

  1,4-polyisoprenes

  খ

  butyl rubber

  গ

  nitrile butadiene rubber

  ঘ

  all of the mentioned