Take an artificial silk thread and a pure silk thread burn these thread carefully.did you notice any difference in the smell while burning? Now burn a woolen fibre carefully. Did it smell like burning of artificial silk or that of pure silk? Can you explain why?
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The fabric which burns giving a smell of burning hair is natural silk or pure silk.
The fabric which burns giving a smell of burning paper is an artificial silk.
Like silk, wool is also made up of proteins. So, a piece of woollen fabric also burns giving the smell of burning hair.
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1. Take a piece of natural silk fabric and another piece of artificial silk fabric.
2. Burn both the fabrics separately and observe the smell produced.
Conclusion:
1. The fabric which burns giving a smell of burning hair will be natural silk or pure silk.
2. The fabric which burns giving a smell of burning paper will be artificial silk.
Just like silk, wool is also made up of proteins. So, a piece of woollen fabric also burns giving the smell of burning hair.
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