Question

There is a large group of materials P which can be divided into three groups
properties. The substances belonging to group Q can be solids, liquids or
group Q are usually electrical insulators. Most of the substances of group
conductors of electricity. The substances belonging to group S are neither insula
Like R The properties of S are intermediate between those of Q and R.
What could the group of materials P be?
Name the substances Q. Give two examples of such substances.
lo Name the substances R. Write two examples of such substances.​

Answer 1

Answer:

Here is your answer..

(a) Materials present in group 'P' are known as elements.

(b) The substances 'Q' which are poor conductors of electricity and exist in all the three states of matter, are non-metals. Example: Carbon and Bromine.

(c ) The substances 'R' are metals since they are good conductors of electricity. Example: Copper and Aluminum.

(d) The substances 'S' are metalloids or semi-metals since they have characteristics common to both 'P' and 'Q'. Example: Arsenic and Antimony.

(e) 'R' is a metal , therefore, it is malleable and ductile.

I hope this would help you out..