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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?

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? Correct Answer polyacrylonitrile

The polymers containing or liberating formaldehyde can turn the solution dark violet. Thus, polyacrylonitrile does not respond to this test.

Related Questions

Six friends B1, B2, B3, B4, B5 and B6 are playing a game. Each of them likes one colour among red, yellow, black, white, green and blue. Each of them like one tie among T1, T2, T3, T4, T5 and T6. None of them likes the same colour and None of them likes same tie. One who likes T3 also likes yellow colour. One who likes T5 also likes red colour. B1 don’t like red colour. B6 likes T2 tie and black colour. B2 likes either white colour or green colour. B4 likes T1 tie. One who likes green colour also likes T4 tie. Either B1 or B5 likes T4 tie. B5 like either yellow colour or red colour. If B3 likes T3 tie, then which of the following combination of Tie – Colour – Friend is not correct?
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Read the statement and decide which conclusions are correct.
Statement:
Sulphuric acid is acidic in nature.
Conclusion:
1. The pH value of sulphuric acid is 7.5.
2. Sulphuric acid contains some phosphorus.
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