Question

Q2. Sita performed an activity to identify the different kinds of fabrics by burning small threads from them. Help her to

draw correct conclusions from the following observations:

a) Thread A shrunk while burning and produced black smoke.

b) Thread B burnt slowly and smelt like burning hair.

c) Thread D formed a hard bead on burning. ​

Answer 1

Answer:

Explanation:

a) it is cotton which shows black smoke when burned!

b) it is wool bcz it is a hair only of sheeps

c) it is a synthetic fibre had melted and formed a bead of plastic!

Answer 2

Answer:

i) Polyester fibre

ii) Protein fibre

iii) Acrylic fibre