Synthetic fibres - class-VII

Bedsheets are made by blended fibre i.e. a mixture of rayon and cotton. Rayon is a versatile fibre and is widely claimed to have the same comfort properties as natural fibres, although the drape and slipperiness of rayon textiles are often more like nylon. It can imitate the feel and texture of silk, wool, cotton and linen. The fibres are easily dyed in a wide range of colours.

Nylon fabrics have low resistance to sunlight. 

Nylon is a synthetic fibre which has certain chemical properties which makes their fibres strong.

Nylon fibre gives smell of plastic.

A. Nylon thread is stronger than steel wire because nylon fibre is made up of strong amide linkages which gives it strength.

Nylon fibre is strong, elastic and light. It is lustrous and easy to wash.

Nylon has various characteristics like a higher impact resistance, a more rapid moisture absorption, greater elasticity and elastic recovery. Nylon absorbs moisture readily as compared to silk so nylon saree dries up faster than silk saree in the sun.

Ropes made of nylon and polyester are commonly used in cranes and elevators because It is very strong, fairly elastic and light weight.

Rayon is manufactured regenerated cellulose fiber. It is made from purified cellulose from wood pulp which is converted into soluble compound which is chemically solidified to form synthetic fiber. Because rayon is manufactured from naturally occurring polymers, it is considered a semi-synthetic fiber.

Synthetic fibres having commmon property are nylon and polyster.

Nylon is a synthetic fiber that is not breathable and can melt or become uncomfortable in high heat, making it unsuitable for summer clothing. The other statements are scientifically accurate.

Terylene is a polyester, not a silk-like synthetic fiber (which is usually rayon or nylon). Rayon is regenerated cellulose, and PET is a type of polyester, making statements II and III true.

Nylon was developed simultaneously by Wallace Carothers at DuPont in the United States and by researchers in the UK, making it the correct answer.

The fibre obtained from cellulose is rayon.

 Nylon is a thermoplastic silky material that can be melt-processed into fibers.

Rayon is a regenerated fibre.

Nylon fiber is known for its high tensile strength and durability, often cited as being stronger than steel wire of the same diameter.

Nylon got its name Ny from Newyork and Lon from London.
Option A is correct.

Terrywool, Terrycot and Terylene all contain polyester.

Rayon is made from cellulose.

Bakelite is a man made polymer by polymerization of phenol and formaldehyde. First Navoloc is formed and then Bakelite is formed.

Rayon is known as regenerated fibre because it is manufactured from natural resources like cellulose present in wood pulp and short fibres.

Polyester is a category of polymers that contain ester in their main chain.

Terylene is a popular  trademark of synthetic polyester fibre. The fabric is based on terephthalic acid, characterized by lightness and crease resistance and used for clothing, sheets, ropes, sails, etc. 

PET is a very familiar form of polyester. PET is used for making bottles.

Synthetic fibres like polyesters dry up quickly.

Tensile strength of polymer increases with increase in chain length and cross-linking of polymer chains. According to this, the tensile strength of wool < silk < cotton < nylon < polyester. Artificial fibers like nylon and polyester are designed specially to have more tensile strength.

PET is light weight, naturally colourless with high transparency, strong and impact resistant. It is shatter proof. All these properties of PET makes a highly more suitable material than glass for making bottles, jars, utensils etc.

A common form of polyester is PET.