Select the year in which nylon was made.

Uses of rayon include

The correct option is d)All of the above.
Uses of Rayon: Rayon is a semi-synthetic fiber made from regenerated cellulose. Along with natural cellulose fibers such as cotton, kapok, linen, hemp, jute and ramie, rayon is used in a wide range of home furnishings, fine functional fashion fabrics.
1. Used to produce fibers in the textile industry.
2. Rayon is used for the tire cord.
3. Also used to make carpets and surgical bandages.

Synthetic fibers do not absorb much

The correct option is c)Water.
Synthetic fibers absorb less water than natural fibers because there are no voids between each fiber. Because water does not penetrate the individual fibers of this fabric, it dries quickly. Hydrophilic fibers readily absorb water without causing discomfort to the wearer, whereas hydrophobic fibers are where the fibers do not absorb water.

Choose one of the following, which is not a part of 4R’s formula.

The correct option is d)Reinvent.

• Reduce consumption at source.
• Reuse items as often as possible to extend the life of the item.
• maximum recycling.
• RECOVER is composting garbage that can be decomposed at home.
• There are 4 Rs necessary to protect and sustain the environment.
• The 4 R's are Reduce, Reuse, Recycle and Recover. Reduce the amount of waste generated. If the material can be used, please modify and reuse the material.
• This reduces the amount of waste generated.
• Recycle waste and use recycled forms of waste. Reduce waste by maximizing waste recovery after recycling.

The type of polymers are

The correct option is c)3.

• There are three types of polymers: synthetic, semi-synthetic, and natural.
• Synthetic polymers are derived from petroleum .
• Examples of synthetic polymers include nylon, polyethylene, polyester, Teflon, and epoxy.
• Natural polymers exist in nature and can be extracted.
• Semi-synthetic polymers are usually derived from the naturally occurring polymer cellulose. Semi-synthetic polymers are also called thermoplastic polymers.

In which season is wearing rayon clothes comfortable?

The correct option is d)Summer.

• Viscose is very similar to cotton and linen. It does not trap body heat and absorbs water easily, keeping you cool and comfortable in tropical conditions.
• Therefore, it is a particularly suitable fabric for summer.
• Rayon has very fine fibers, so it is more breathable than other fabrics and is light enough to not stick to the body even in hot weather.
• Due to its comfortable and cool feel, viscose is a particularly suitable fabric for sportswear and summer dresses.

Assertion: While working in the kitchen, we should not use synthetic fabrics.
Reason: Synthetic fabrics are easy to wash and dry up in less time.

Choose the following substance which is made up of thermosetting plastic.

Melamine is used in Crockery.

Synthetic fibers are

Choose one of the following small units which are used in the making of polymers.

Raw materials are obtained from which of the following for the making of synthetic fibers?

The correct option is d)All of the above.
Plant/Tree Based - Materials such as vegetables, fruits, flowers, wood, resins and latex are derived from plants and trees. Animal - Materials such as leather, meat, bones, milk, wool, and silk all come from animals. Mining - Materials such as minerals, metals, oil and coal are obtained by mining the earth

The plant fibers' basic component is

The correct option is b)cellulose.
One of the most abundant biomaterials on earth IS Cellulose. Usually synthesized by plants, but also produced by some bacteria. Like starch, cellulose is a homopolymer of glucose, but unlike starch, the glucose monomers are held together by β-1,4 linkages.

Select a synthetic fiber from the following.

The correct option is a)Rayon.
Synthetic fibers are man-made fibers, most of which are made from petroleum, called petrochemicals. Rayon is a regenerated cellulose fiber, commonly derived from wood pulp. Rayon is usually made from the eucalyptus tree, but any plant can be used (bamboo, soybean, cotton, etc.).

Select a natural polymer from the following.

The correct option is c)Silk.
Silk is a natural fiber produced by insects as material for nests and cocoons. There are several species of silk-producing insects, including silkworms (the most common type of silk), beetles, honeybees, bumblebees, hornets, and weaver ants.

_____ fiber is made of a natural polymer called cellulose.

The correct option is c)Cotton.
As cotton is made up of long chains of glucose molecules, it is naturally found in plants and is made up of pure cellulose, a naturally occurring polymer. Cellulose is actually a naturally occurring polymer. It is mainly obtained from plant wood and its derivatives such as grasses, aquatic plants. Cellulose helps plants stay firm and tough and is an important source of dietary fiber.

Select the correct characteristics of plastics.

The correct option is d)All of the above.
Plastics, like synthetic fibers, are polymers that, while flexible, can be molded into desired shapes and sizes and cured to create durable objects. The term "plastic" is derived from the Greek word "plastikos" meaning "to form" and is used to refer to a wide range of semi-synthetic polymers.
Properties of plastic:

• They are light and chemically stable.
• It can be easily molded into different shapes and sizes.
• Excellent heat insulation and low thermal conductivity.
• It has excellent impact resistance and does not rust.
• Excellent transparency and abrasion resistance.
• Poor dimensional stability and easy to deform.
• processing cost is low.