GATE (TF) Textile 2000 Question Paper Solution | GATE/2000/TF/3B

Question 3-B (Textile Engineering & Fibre Science)

An unknown fibre was heated in hard glass test tube in the presence of sode time. The vapours this obtained gave white fumes when contacted with a glass rod dipped in dilute HCl. In other experiment, the sodium extract of the same fibre gave back precipitate with acidified lead acetate solution. Identify the fibre. Give reasons in support of your answer.

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