Which of the following fibres are made from petroleum products?
All the synthetic fibres are prepared by using raw materials of petroleum origin. It includes terylene, decron, and acrylon etc.
What is the saturated solid state?
Which one is artificial silk?
Rayon is called as artificial silk. It is obtained from wood pulp containing cellulose. Chemical treatment of wood pulp forms rayon fibre which can be dyed in a variety of colours.
When plastics are burnt they release:
When plastic is burnt, they release toxic gases that includes, carbon dioxide, carbon monoxide, sulphur dioxide etc. They cause air pollution.
Which of the following is incorrect regarding plastics:
Plastics are non biodegradable, resistant to weather and durable. Plastic can be recycled too. It is used to make chairs, rope, bucket and a number of other utensils.
_____ is blended with wool for making carpets.
_____ is blended with wool to give terrywool.
Polyester is blended with wool to give terry wool. Terry wool is used to make winter dresses and other kinds of fabrics. It is durable and easy to wash.
Fibre as soft as wool is :
Acrylic is a synthetic fibre as soft as wool. Synthetic fibres are more durable and affordable and can be coloured in variety of colours.
The fibres obtained from animals are made up of:
Animal fibers are natural fibers that consist largely of particular proteins.
Raw materials for the synthetic fibres are derived from :
Raw materials for the synthetic fibres are derived from petroleum products using a number of processes. Therefore, these fibres are called as synthetic fibres.
What is PET?
PET is polyethylene terephthalate, a plastic resin and a form of polyester. Polyethylene terephthalate is a polymer that is formed by combining two monomers: modified ethylene glycol and purified terephthalic acid. The first PET bottle was recycled in 1977.
Name NYLON was derived from:
“nylon” came from “New York” and “London”, because two chemists thought up the word on an intercontinental flight from one of the cities to the other.
Remoulding can be done of :
Polyvinyl chloride (PVC) is a thermoplastic which can be remoulded by heating. It is used for making pipes and other materials which is flexible and durable.
Unbreakable kitchenware is made from :
Unbreakable kitchenware is made from melamine. Melamine is a thermosetting plastic is resistant to fire and can tolerate heat better than other plastics.
Which of the following is a thermosetting plastic ?
Melamine is a thermosetting plastic as it cannot be moulded by heating. Polyester, Nylon and PTFE are thermoplastic that can be change in shape by heating.
Yarn is twisted to form :
Yarn is twisted to form thread. Thread is a type of yarn intended for sewing by hand or machine. Yarn is a long continuous length of interlocked fibre.
A man- made fibre obtained from natural source is :
Rayon is a man-made fibre obtained from natural source. Rayon is obtained by chemical processing of pulp of wood containing cellulose.
The first fully synthetic fibre is :
Nylon, the first synthetic fiber in the "fully synthetic" sense of that term, was developed by Wallace Carothers.
Woollen apparels can be made from :
Wool and acrylic is used to make woollen apparels for winter season. Wool is a natural fibre obtained from goat, sheep or yak but acrylic is made fibre which is more durable and less expensive.
Such plastic which gets deformed easily on heating is called:
When we add hot water to a plastic bottle, it gets deformed. Such plastic which gets deformed easily on heating and can be bent easily are known as thermoplastics.