Tag: synthetic fibres

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Questions Related to synthetic fibres

Multiple choice chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

Polyester consists of :

  1. repeating unit of ether

  2. monomer of ester

  3. repeating units of ester

  4. monomer of ether
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

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


 Polyesters are used to make bottles, films, holograms, filters, dielectric film for capacitors, film insulation for wire and insulating tapes.

Hence the correct option is C.

Multiple choice chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

Arrange the following fibers in the order of increasing strength:

Nylon, Cotton, Wool, Polyester, Silk

  1. Silk, Wool, Cotton, Nylon, Polyester

  2. Wool, Silk, Cotton, Nylon, Polyester

  3. Cotton, Silk, Wool, Nylon, Polyester

  4. Nylon, Cotton, Silk, Wool, Polyester
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

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.

Multiple choice chemistry substances in daily use polyester and acrylic rayon and nylon synthetic fibres

Why PET is increasingly used for making bottles, jars and utensils?

  1. It is light weight and very strong

  2. It is shatter proof

  3. Impact resistant

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

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.