Tag: synthetic fibres and plastics

Quizzes (16) Questions (42)

Questions Related to synthetic fibres and plastics

Multiple choice chemistry synthetic fibres and plastics synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

Cellulose dissolved in a mixture of sodium hydroxide (NaOH) and carbon disulphide produces :

  1. Viscose

  2. Rayon

  3. Polyamide

  4. Polyester
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cellulose (say, cotton) is dissolved in a mixture of sodium hydroxide (NaOH) and carbon disulphide ($CS _2$, a solvent). A viscous liquid (i.e., a liquid which cannot flow freely) called viscose is obtained. The viscose is then forced through spinnerets (which have small holes) into an acid bath, and filaments of viscose rayon are obtained.

Multiple choice chemistry synthetic fibres and plastics synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

Commonly used synthetic fabrics are:

  1. polyester

  2. nylon

  3. rayon

  4. acrylic
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation
 Fabric  raw material
 Polyester  ester
 Nylon  carpolactam
 Rayon  wood pulp
 Acrylic  polyacryonitrile

The fabrics that are produced entirely from chemicals are known as synthetic fabrics. Examples of synthetic fabrics are nylon, polyester, rayon, and acrylic

Multiple choice chemistry synthetic fibres and plastics synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

Synthetic fibres are made using __________ as raw materials.

  1. woollen products

  2. polymers

  3. cotton

  4. petrochemicals
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Synthetic fibres are not obtained from natural resource but it is manufactured in a laboratory using petrochemicals. Synthetic fabrics are textiles made from man-made rather than natural fibres. Examples of synthetic fabrics include polyester, acrylic, nylon, rayon, acetate, spandex, latex, Orlon and kevlar. Synthetic (chemically produced) fabrics are made by joining monomers into polymers, through a process called polymerisation. 


Chemicals used to make synthetic fabric include sodium hydroxide and carbon disulfide, which are derived from coal, oil, or natural gas (petrochemicals). Pressure forces the liquid chemicals through tiny holes called spinnerets. As the liquid comes out of the spinnerets and into the air, it cools and forms tiny threads. Manufacturers add artificial dyes to these threads before weaving them into a fabric.

Hence, the correct option is $D$

Multiple choice chemistry synthetic fibres and plastics synthetic fibres & their characteristics processing of fibres synthetic fibres and its types

Which of the following changes came regarding dressing styles after 18th century?

  1. People dressed according to their regional codes

  2. People could use styles and materials that were drawn from other cultures and locations

  3. Dressing was limited by the types of clothes and the cost of material available in their region

  4. Clothing styles were strictly regulated by class, gender or status
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

People could use style's and materials that were drawn from other culture and locations. These are the changes came regarding dressing styles after $18^{th}$ century.