Why rayon is called artificial silk

Rayon appears and feels like silk. Hence, Rayon is called artificial silk. Which is artificial silk example? Rayon is known as artificial silk. It has properties similar to silk. It was obtained by chemical treatment of wood pulp.

It is a man-made fibre. Is rayon the first synthetic Fibre? So it is the first man made fiber. Nylon is the first synthetic fiber made completely of chemicals. So, it is called the first synthetic fiber. Which Fibre is known as artificial silk Why? Artificial silk or art silk is any synthetic fiber which resembles silk, but typically costs less to produce. When made out of bamboo viscose it is also sometimes called bamboo silk.

Artificial silk or rayon is produced in mills, is produced in bulk at one time and requires less labour and skill whereas original silk is produced by the silk worms and it requires a lot of skill, labour and time to treat the worms and extract silk from them. Hence artificial silk is cheaper than natural silk. Rayon is called the artificial silk because it resembles silk both in texture and look.

It is cheaper than silk and can be woven like silk fibres. Rayon is a semi-synthetic fabric and cotton is a natural fabric. Cotton is more costly than rayon.

A very important thing about both the fabrics is, rayon is used in the fashion industry but cotton covers the large sector of the industry even the medical industry uses cotton. Rayon is widely marketed as an easy-breezy fabric that will keep you cool when the temperatures rise.

Rayon is a semi synthetic fibre which is woven with some natural fibres. Nylon, on the other hand, is a synthetic fiber completely. The basic difference between the two is their response to wear and tear. Rayon is more susceptible to wrinkles and tears whereas nylon has great resistance for it.

Rayon is also known as Artificial silk! It is used for making gaskets, pump packings, valves, seals etc. Uses: It is used to make electrical goods, combs, fountain pens, buttons, plugs and switches. Bakelite, a thermosetting plastic, is used to make plugs and switches. Thermosetting plastics are bad conductors of heat and electricity.

They do not allow electricity to pass through, which is why they are used to make plugs and switches. Synthetic fibres catch fire very easily. They melt on heating and stick to the body of the person wearing them. However, rayon is regenerated from cellulose and it doesn't melt on burning, rather it flares up like paper and smells like it.

Cotton smells like burning paper because both cotton and paper are extracted from plants and constitute mainly cellulose, whereas burning wool smells like burning hair because both wool and hair are extracted from animals and both have sulphur in them. Plastics are non-reactive. They last much longer than any other material.

They cannot be decomposed by bacteria and so are non-biodegradable in nature. These properties make plastics useful but also make them as environmental hazard. Clay is a 'plastic' material because we can mould it into different shapes, which is a property of plastic.

But clay is not a polymer because polymers are made up of monomer units while clay is not made up of monomer units. Clay is a mixture of compounds. Ankit was learning how to cook. His father strictly told him not to wear nylon clothes in the kitchen. Nylon is a synthetic fibre. Synthetic fibres catch fire easily. They are inflammable. They melt on heating and stick to the body of the person wearing them which causes severe burn injuries.

Therefore, these type of clothes are not suitable in a kitchen. When smaller units of a chemical substance are combined to form a large single unit, it is called a polymer. Examples are cellulose, polythene etc.

Rayon is called a regenerated fibre because its preparation involves the chemical breakdown of cellulose using an alkaline solution. This is followed by the regeneration of solidified synthetic fibres by passing them through spinnerets.

They stick to the body and cause skin irritation when the body sweats during summers. Plastic is a synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon etc. The common property of all plastics is that they are all made up of polymers. Plastic bottles are commonly used to store chemicals in a chemical laboratory because plastics are non-reactive.

They are inert to air and water. They are non-corrosive, therefore we can store chemicals in them safely. List the important properties of nylon that make it a useful synthetic fibre. Give two important uses of nylon. Following are the properties of nylon which make it a useful synthetic fibre: 1 Nylon fibre is very strong and elastic. The uses of nylon are: 1 It is used to make ropes. The uses of polyester are as follows: 1 Being very strong and crease resistant, polyester is used to make pants, shirts, suits and bed sheets.

These days clothes made out of a mixture of synthetic fibres and natural fibres are more popular than those made purely out of synthetic fibres. Discuss the reasons for this. Clothes purely made of synthetic fibres are not comfortable in hot and humid weather as they are water resistant and do not absorb sweat from the body. They catch fire easily and stick to the body and cause severe burns and injuries.

Therefore, they are not suitable in kitchen and laboratories. On the other hand, clothes spun out of fibres made by a mixture of synthetic and natural fibres do not cause such problems. Moreover, mixing synthetic fibres with natural fibres enhances their properties, such as strength, elasticity and ease of washing and ironing.

Thermoplastics Thermosetting plastics 1 Thermoplastics can be softened on heating again and again, therefore they can be moulded and reshaped. Thermosetting plastics cannot be softened on heating, therefore they cannot be moulded and reshaped.

Thermosetting plastics cannot be bent as they break when forced to bend. Examples are bakelite and melamine. Plastics are useful but today they have become a serious global environment and health concern due to their excessive use. This is because plastics are non-biodegradable. They cannot be decomposed by the microorganisms in the soil. Inappropriate disposal of plastics is a serious problem.

It chokes drains and blocks the pores of soil, which hinders the absorption of water by soil. Plastic bags contaminate food because of the poisonous dyes associated with them. Moreover, burning of plastics releases poisonous fumes, which causes air pollution. These fumes also cause cancer. The following three steps can be taken to reduce the danger that plastics pose to the environment: 1 We can support recycling schemes.

Page No Question 1: Which of these is a natural fibre? Answer: b cotton Natural fibres are greatly elongated hair-like substances obtained from plants or animals. Question 2: Which of these is a fibre derived from chemicals?

Answer: c nylon Fibres derived from chemicals are polymers. Question 3: Which of these fibres is made from a raw material obtained from plants? Answer: a rayon Rayon is a manufactured regenerated cellulose fibre that is made from purified cellulose, primarily from wood pulp.

Question 4: Which of these is a thermosetting plastic? Answer: b bakelite Thermosetting plastics are rigid and heavily cross-linked polymers. Question 5: Which of these plastics is a polymer?

Answer: d all of these A polymer is a macromolecule composed of many repeated subunits, known as monomers. Question 6: Which of these plastics can be repeatedly heated and moulded into any desired shape? Answer: b polythene Polythene is a thermoplastic polymer consisting of long hydrocarbon chains. Question 7: Which of these can you use as a substitute for glass in windows?

Answer: c perspex Perspex is a thermoplastic. Question 8: Which of these is not a property of plastics? Answer: d soluble in water Plastics are insoluble in water. Question 1: What name is given to natural materials that are used to manufacture human-made materials?

Answer: Natural materials that are used to manufacture human-made materials are known as raw materials. Question 2: What is the most common source for synthetic fibres? Answer: The most common source for the synthetic fibres is petroleum. Question 3: Which artificial fibre is made from wood pulp?

Answer: Rayon is an artificial fibre that is made from wood pulp. Question 4: Cotton and wool are natural polymers. True or false?

Answer: True. Question 5: Which synthetic fibre is commonly used to make strong ropes? Answer: Nylon is a synthetic fibre which is very strong, even stronger than steel wire. Question 6: Which synthetic fibre is also called artificial silk?

Answer: Rayon, a synthetic fibre, is also called artificial silk. Answer: All plastics are made of long chain molecules called polymers. Question 8: Name the plastic whose sheets are used for packing liquids.

Answer: Polythene sheets are used for packing liquids. Question 9: From which plastic material is thermocol made? Answer: Thermocol is made from polystyrene plastic. Question Which plastic material is used to make non-stick pans? Answer: Teflon is used to make non-stick pans.

Question 1: How is rayon made? Why is it called artificial silk?