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.

Nimit prepared a flowchart to show classification of fibres and plastics. He left a few columns blank. Fill in the blanks by choosing the option with correct words.

Which of the following is not a thermosetting plastic?

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:
 

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?

Directions: 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_____.

Directions: 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.

Directions: Identify A, B, C and D in the following chart.

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

________ is a natural protein fibre, some forms of which can be woven into textiles.

Select the option that correctly fills the blanks in the given statements.

I. __(i)__ fibres are produced by plants, animals and geological processes. They are __(ii)__ over time.
II. __(iii)__ fibre is used for making paper.
III. __(iv)__ is a naturally occurring mineral fibre.
IV. __(v)__ and __(vi)__ are examples of cellulose fibres.

 

Which element is used for the vulcanisation of rubber?

_____________ is stronger than a steel wire.

Study the dichotomous key and identify W, X, Y and Z.

I. (i) A regenerated fibre
(ii) Purely synthetic fibre Go to II

II. (i) Resembles wool
(ii) Has a silk-like sheen Go to III

III. (i) Is a polyamide
(ii) Is a polyester
 

________ is a polyester used for making bottles, utensils, films.

Polyester is formed by the repeating units of _______.

Observe the following flow chart and select the correct statements about P, Q, R and S:



I. P is used to make blankets.
II. Q is said to be first commercially produced in New York and London.
III. R is also called spandex.
IV. S is a polyamide.

Read the two statements given below and select the correct option.

Statement I: Synthetic fibres are used to make medicine capsules and to give internal stitches during surgeries.
Statement II: These fibres are biodegradable.