Match column I with column II and select the correct answer from the given codes.

	Column I		Column II
P.	A synthetic fibre also called artificial silk	(i)	Spandex
Q.	A synthetic fibre is also known as lycra	(ii)	Acrylic
R.	A synthetic fibre that closely resembles wool	(iii)	Rayon
S.	The first true synthetic fibre	(iv)	Nylon

Match column I with column II and mark the correct option from the given codes.

Select the correct option for the given statement.
I. Plastics are generally good conductors of electricity.
II. Ropes made by bakelite are used in cranes and elevators.
III. Teflon is a special plastic on which oil and water do not stick.
IV. Plastic is non-biodegradable, hence not environment friendly.

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