Synthetic Fibre...

Which of the following statements are true?

I. Plastics are generally good conductors of electricity.
II. Ropes made of bakelite are used in cranes and elevators.
III. Teflon is a special plastic to which oil and water do not stick.
IV. Plastic is non-biodegradable and hence, not environment friendly.

Which of the following is not a thermosetting plastic?

Bamboo is an important requirement in sericulture. How is bamboo useful for sericulture?

(i) Making trays for feeding the larvae.
(ii) Making montages for the production of cocoons.
(iii) Making chambers for storing the eggs.
(iv) Making tools for unwinding the threads.

Nisha has four dresses, made up of four different fabrics:
'A' is made of cotton, 'B' is of silk, C is of rayon and `D` is of polyester.

Which dress should she wear during a journey so that it does not get wrinkled easily?

In the following table, match the synthetic materials in the first column with their properties in the second column:

You have some raw cotton in your hand. Pinch some cotton between the thumb and finger of the other hand. Now, start pulling out the cotton while continuously twisting the fibres. What do you get by doing this?

Smita was wearing a nylon dress while cooking on a gas stove. Her father told her to change her dress and wear a cotton dress for working near the gas stove. Why do you think the nylon dress was not suitable while working in the kitchen?

Read the statements and choose the appropriate answer.

Statement 1: Fabric made of pure synthetic fibre is not preferred for summer clothing.
Statement 2: Synthetic fibres have low moisture absorbency.

Which of the following pairs is not correctly matched?

Select the option which correctly fill the blanks (A) - (C).

(a) Synthetic fibres are also called ______A ____ fibres.
(b) Synthetic fibres are synthesised from raw materials called ____B____.
(c) Like synthetic fibres, plastic is also a _____C_____.

Shekhar wants to make a plastic container that be recycled. Which of the following materials would you suggest him to make such a container?

Read the given passage and fill in the blanks by choosing an appropriate option.

Cellulose is a natural occurring fibre. The walls of a ____(i)_____ are made of cellulose.
It is used in making the synthetic fibre ______(ii)_______ which is resemble the most expensive natural fibre _______(iii)_______ in appearance.

A few polymers grouped together on the basis of some common property as follow:

Group I: Nylon, Hemp, cotton, jute
Group II: Bakelite Melamine, PVC
Group III: Polycot, terry wool, acrylic.

Choose odd one out in the group I, II and III