Fiibers and fabrics: analyse and choose an answer

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1. Silk and rayon both are obtained from natural sources such as plants and animals. But, silk is a natural fibre, and rayon is an artificial fibre. Why?

Rayon can be mixed with cotton
Natural Silk is obtained from silkworm which is a living thing.
Classification is based on the amount of time taken to manufacture
Rayon fiber manufacturing involves chemical treatment

2. Plastics are mostly avoidable in the case of storage of food. Why?

They are leaky
Plastics reacts with heat from the food and makes it harmfull
Colouring agents added to plastics
None of these

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12. Fiibers and fabrics: analyse and choose an answer

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