Question

While doing an experiment to see the characteristics of various
fibres Prakash hold the cotton fibre in his hand and was about to burn
it on the burner. On seeing this, his classmate Ratan stopped him
immediately 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 observed
after burning test?

Answer 1

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