Question 16 (Textile Engineering & Fibre Science)
The sodium extract of fibre X was prepared by fusing the fibre with sodium metal and dissolving in distilled water. On portion of the extract was boiled and as the vapours were made to contact a glass rod dipped in dilute HCL, white fumes were observed. To the second portion of the extract, acidified lead acetate solution was added which resulted in the formation of black precipitate. The fibre X is
| (A) | Polyester |
| (B) | Silk |
| (C) | Acrylic |
| (D) | Wool |
[Show Answer]
OptionB