Rayon

Q.

Rayon is different from truly synthetic fibres because :

(a) it has a silk-like appearance.

(b) it is obtained from wood pulp.

(c) its fibres can be woven like those of natural fibres.

(d) it can be dyed in wide variety of colours.

Q.

Name the synthetic fiber which resemble silk and wool

Q.

Name the fibre obtained by the chemical treatment of wood pulp (or cellulose).

Q.

Which of the following is a man -made fibre prepared from wood-pulp ?

Q.

The man-made fibre rayon is chemically identical to :

(a) wool (b) silk (c) jute (d) cotton

Q. Fibres of resemble that of silk and hence, it is popularly known as 'artificial silk'.

1. nylon
2. rayon
3. acrylic
4. polyester

Q. Fibres of resemble that of silk and hence, it is popularly known as 'artificial silk'.

1. nylon
2. rayon
3. acrylic
4. polyester

Q.

Name the man-made fibre which is regarded as artifical silk.

Q.

Name the man -made fibre perpared from natural materials.

Q.

The man-made fibre made from the cellulose polymer is :

(a) nylon (b) acrylic (c) rayon (d) polyester

Q.

(a) What is rayon ? How is rayon made ?

(b) Give any two uses of rayon.

Q. Rayon is a natural fibre as it is obtained from wood pulp.

1. True
2. False

Q. Fibres of _______ resemble that of silk and hence, it is popularly known as 'artificial silk'.

1. Nylon

2. Polyester

3. Acrylic

4. Rayon

Q.

Question 2
Explain why Rayon is different from synthetic fibres ?

Q. Which of the following synthetic fibres is also known as 'artificial silk'?

1. Rayon
2. Nylon
3. Acrylic
4. Polyester

Q. Nylon is prepared by the physical treatment of wood pulp.

1. False
2. True

Q. Identify the fibre having all the characteristics and uses that are given below:

1. Obtained from petrochemicals.
2. Wrinkle-resistant and easily washable
3. Used to make soft drink bottles, boats, toys, etc.

1. Cotton
2. Rayon
3. Polyester
4. Acrylic

Q.

Question 13
Match the terms of column A correctly with the phrases given in column B.

$\begin{array}{cccc}& A& & B\\ \left(i\right)& Polyester& \left(a\right)& Preparedbyusingwoodpulp\\ \left(ii\right)& Teflon& \left(b\right)& Usedformakingparachutesandstockings\\ \left(iii\right)& Rayon& \left(c\right)& Usedtomakenon-stickcookware\\ \left(iv\right)& Nylon& \left(d\right)& Fabricsdonotwrinkleeasily\end{array}$

Q. Read the statements and select the option that correctly identifies them as true (T) and false (F).

1. Most synthetic fibres are obtained from coal, petroleum, and natural gas.​
2. Acrylic fibre closely resembles wool.​
3. Most synthetic fibres have very high moisture absorbing capacity.​
4. Polyester is prepared from cellulose.​

	1	2	3	4
A	T	F	F	T
B	T	T	T	F
C	T	T	F	F
D	F	T	T	F

Q. Production of synthetic fibre helps in the conversation of forest. Explain.

Q. Which of the following fibre is obtained by chemical treatment of wood pulp?

1. Silk
2. Nylon
3. Rayon
4. Polyester

Q.

The manufacture of one of the following artificial fibres contributes to deforestation. This fibre is :

(a) nylon (b) rayon (c) terylene (d) acrylic

Q. True or False

Q.

Which of the following is known as artificial silk?

1. Nylon

2. Rayon

3. Acrylic

4. Polyester

Q. ‘Manufacturing synthetic fibres is actually a helping conservation of forests’. Comment.​

Q.

Who is considered as the "Father of Rayon"?

1. Louis Pasteur

2. Hilaire de Chardonnet

3. Yu Ming Han

4. John Dalton

Q. Why is rayon also known as artificial silk? Give its two uses.

Q. Assertion :Teflon is a plastic on which oil and water do not stick. Reason: It is used to coat non-stick cooking pans and other cookware.

1. Assertion and reason both are correct statements and reason is correct explanation for assertion.
2. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
3. Assertion is correct statement but reason is wrong statement.
4. Assertion is wrong statement but reason is correct statement.

Q. Which of the following fibre is obtained by chemical treatment of wood pulp?

1. Nylon
2. Silk
3. Rayon
4. Polyester

Q. Read the following statement and mark the correct answer

1. Statement I is false, II and III are true
2. Statement I is true, II and III are false
3. Statement I and II are false, III is true
4. Statement II is true, I and II are false