Once, Paheli visited a tailor shop and brought home some cuttings of fabric to study their properties. She took two pieces and found that piece A was shrinking when it was burnt with a candle. However piece B did not shrink on burning. Can you help her to find out which of the two was a cotton fabric and which a silk fabric?
A cotton B silk
A silk B cotton
A silk B jute
none of the above
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Answer:
Explanation:
Cotton and silk
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The fabric was A silk B cotton.
- Silk and cotton are the fibres used in textile industry for production of clothes, sheets, curtains etc.
- On the heat test, both the natural fibres do not melt.
- On burning the fibres, silk fibre shrinks away from the flame. They also produce characteristic odour of charred meat.
- Cotton fibre when bought near the flame burn and do not move away from it.
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