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Fibre to Fabric — Science STD 6 — Question

CBSE BoardEnglish MediumSTD 6ScienceFibre to Fabric1 Mark
Question
Why are cotton and woollen clothes rough and silk, rayon, nylon, polyester smooth to touch?
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Answer

Roughness of cotton and woollen fibre is due to presence of many folds and uneven surfaces in it. Silk, rayon, nylon and polyester are smooth because they have long plain, fine structure.

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