Read the given statements and mark the appropriate answer.

Statement 1: Polyester is synthesised from petrochemicals by linking ester units.
Statement 2: Polyester is a natural fibre.

See the figure given below and select the correct statements regarding polymers.

1. Figure (X) shows structure of a monomer while figure (Y) shows structure of a polymer.
2. Small boxes in the structure represent monomers which are joined to give a polymer.
3. Figure (X) shows structure of a linear polymer while (Y) shows structure of a cross-linked polymer.

Fill in the blanks by picking up the correct words.

Fibres are materials that are usually thin and have a thread-like structure. They are generally classified as $\underline{\mathrm{P}}$ and $\underline{\mathrm{Q}}$, on the basis of their origin. Natural fibres may be plant fibres like $\underline{\mathrm{R}}$ or animal fibres like $\underline{\mathrm{S}}$.

Sneha has classified a few materials as shown in the table.

The materials which are classified incorrectly are

Anisha prepared a flow chart to show the classification of fibres and plastics. She left a few columns blank. Fill in the blanks by selecting the option with the correct words.

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.

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)__.