The material similar to silk in appearance is

Which of the following is non-biodegradable?

The material which is commonly used for making kitchen containers is

PET is a

Synthetic fibres are synthesised from raw materials called.........

A polymer is a chain of many small units joined together which are called......

A fibre similar to wool is.........

Plastics are............ conductors of heat

Peels of vegetables and fruits are......

Acrylic is an artificial wool.

It is not advised to store food items in plastic containers as it reacts with the material of the container

We get natural fibres from plants and animals

Artificial fibres are stronger than natural fibres.

PVC is thermosetting plastic.

On burning wool, why we get the smell of burning of hair?

As a responsible citizen, we should remember the 4R principle. Can you tell what do 4Rs stand for?

Name two types of plastics

Why is polyester not suitable for summer wear?

Why cotton, wool and silk are natural fibres?

Explain why plastic containers are favoured for storing food?

"Manufacturing synthetic fibres is actually helping conservation of forests". Comment.

Sunita loves to wear the clothes made up of synthetic fibres because these clothes dry up quickly, are durable, less expensive, readily available and easy to maintain. Once, she was working in kitchen. her mother advised her not to wear the synthetic clothes while working in the kitchen. She changed her clothes. Now, give the answer of the following questions.
(a) Why Sunita's mother advised her not to wear synthetic clothes while working in kitchen?
(b) Why Sunita loves to wear the clothes made up of synthetic fibres?
(c) What are the values of Sunita and her mother?

Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to avoid the use of plastic as far as possible. Why?

Write the difference between the raw materials used in rayon and other synthetic fibres like nylon or polyester.

Write the importance of synthetic polymers in our life?

Nikita's mother went to the market to buy new lunch box for Nikita. She saw different lunch boxes made up of plastics as well as steel. Plastics lunch boxes of different colours was very attractive but the steel lunch box was very simple. Nikita's mother told him to select a lunch box for you. She selected a lunch box made of steel instead of plastic one. Her mother purchased the steel lunch box for him.
Read te following passage and answer the following questions.
(a) Why Nikita prefer steel lunch box instead of plastic one?
(b) Is plastic materials environment friendly? Explain.
(c) What values are shown by Nikita?