Question

09. PET is a ______
         (a) polyester                           (b) polyamide
         (c) nylon                                (d) thermosetting polymer
10. Which of the following cannot be recycled?
         (a) Toys                                 (b) Cooker handles
         (c) Carry bags                       (d) Plastic chair
11. Synthetic fibers synthesized from raw materials are called _____
         (a) jute                                  (b) rayon
         (c) petrochemicals                (d) Bakelite
12. Bakelite is an example of _____
         (a) fibre                               (b) elastomer
         (c) nylon                              (d) thermosetting polymer
13. Which term is used for polymers made up of a large number of glucose units?
         (a) Protein                           (b) Fructose
         (c) Cellulose                        (d) Polyester
14. Which of the following is non-biodegradable?
         (a) Paper                              (b) Cotton cloth
         (c)                              (d) Plastic
15. Which of the following is natural fibre obtained from plants?
        (a) Cotton                           (b) Wool
        (c) Rayon                            (d) Ketone
याकोबिन ​

Answer 1

Answer:

a

d

I

dni@ djx xoxnosnak vv udu के आगे बढ़ने की उम्मीद नहीं कर सकता था और वह एक ही समय पर नहीं

Answer 2

Answer:

9) Option a - Polyester

10) Option b - cooker handles

11) Option d - Bakelite

12) Option d - thermosetting polymer

13) Option c - cellulose

14) Option d - plastic

15) Option a - cotton

Explanation:

• PET - Polyethylene terephthalate, is a chemical name for polyester.  It is strong, clear and lightweight plastic.
• cooker handles cannot be recycled whereas toys, carry bags, and plastic chairs can be recycled.
• Synthetic fibres are composed of small molecules. They are from the synthesized polymers. The compounds that form these fibres are derived from petroleum-based chemicals or petrochemicals.  
• Bakelite is polyoxybenzylmethylenglycolanhydride. This was the first made synthetic plastic component. It is a thermosetting phenol formaldehyde resin, upon condensation reaction of phenol with formaldehyde.
• Polymers: They occur in nature. Cotton is a polymer called cellulose. It is made up of a large number of glucose units.  
• Plastics cannot be decomposed by micro-organisms. Non-biodegradable polymers are the ones that cannot be decomposed. Hence, Plastics are non-biodegradable.  
• Cotton is a fluffy staple, soft fibre that grows in a boll, which is a protective case around the seeds of the cotton plant. These plants belong to the genus Gossypium in Family Malvaceae.  

Hence, PET is a polyester. Cooker handles cannot be recycled, Bakelite is synthetic plastic formed by thermosetting. Cotton is a polymer made up of a large number of glucose. Plastics are non-biodegradable. Cotton is a natural fibre obtained from plants.