1.

While doing an experiment to see the characteristics of variousfibres Prakash hold the cotton fibre in his hand and was about to burnit on the burner. On seeing this, his classmate Ratan stopped himimmediately and asked to use tong to hold the fibres.(a) What is fibre?(b) Why did Ratan ask him to use tong to hold fibre?(c) What are the characteristics of woollen and cotton fibres observedafter burning test?

Answer»

Answer:

EXPLANATION:

a A fibre is a THIN THREAD of a natural or artificial substance, especially one that is used to make cloth or rope

c Fiber may shrink from the flame, melt, and can drip (DANGER) leaving a hard plastic-like BEAD. Burning these fabrics will produce black smoke and hazardous fumes


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