A) Natural silk
B) Artificial silk
C) Natural plastic or rubber
D) Synthetic plastic
Correct Answer: B
Solution :
?Rayon? is man-made fibre which consists of purified cellulose in the form of long threads. Rayon resembles silk in appearance. Hence called as artificial silk. \[\underset{(\text{from woodpulp)}}{\mathop{\text{Cellulose}}}\,\underset{C{{S}_{2}}}{\mathop{\xrightarrow{NaOH}}}\,\underset{(\text{Syrup like liquid)}}{\mathop{\text{Viscose}\,\,\,\,\,\,\,\,\,\,\,\,}}\,\] \[\underset{\text{into dil}\text{. }{{H}_{2}}S{{O}_{4}}}{\mathop{\underset{\text{Spinneret}}{\mathop{\xrightarrow{\text{Pass}\,\text{through}}}}\,}}\,\,\underset{(\text{Fine silken thread)}}{\mathop{\text{Rayon}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,}}\,\]
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