A few polymers are grouped together on the basis of some common properties as follows:
Group I : Rayon, acrylic, nylon, jute
Group II : PVC, melamine, teflon
Group III : Polycot, terrywool, acrylic
Select the odd one out in groups I, II and III.
Group I : Rayon, acrylic, nylon, jute
Group II : PVC, melamine, teflon
Group III : Polycot, terrywool, acrylic
Important Questions on Synthetic Fibres and Plastics
Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Refrigerators have insulating wool of plastics
II. Electric wires have a plastic coating
III. Chemicals are stored in plastic containers
IV. Parachutes are made from plastics
Read the given passage and fill in the blanks by selecting an appropriate option.
Cellulose is a naturally occurring fibre. The walls of __(i)__ are made of cellulose. It is used in making a synthetic fibre __(ii)__ which resembles the most expensive natural fibre __(iii)__ in appearance hence, it is also called __(iv)__.
Read the following statements carefully.
P. I am extensively used in the healthcare industry, but my one disadvantage is that I am non-biodegradable
Q. I am very familiar form of polyester and used for making bottles, utensils, films, wires, etc
R. I am artificial silk and mixed with wool to make carpets
and are
Match column I with column II and select the correct option from the given codes.
| Column I | Column II | ||
| P. | Nylon | (i) | Burns quickly with a smell of burning paper |
| Q. | Wool | (ii) | Burns with sooty flame, fabric shrinks and black beads are formed |
| R. | Acrylic | (iii) | Shrinks after exposure to flame, forms hard beads and gives a smell of burning hair |
| S. | Rayon | (iv) | Burns slowly with a smell of burning hair |
