Matter in Our Surroundings — Science STD 9 — Question

What are the three general classes of matter? Give one example of each type.

Give the names and symbols of five familiar substances which you think are elements.

When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?

Which single term is used to describe the mixing of copper sulphate and water kept in a beaker, on its own?

Name two gases which are supplied in compressed form in homes and hospitals.

Stat the chemical symbols for the following elements:
Sodium, Potassium, Iron, Copper, Mercury, Silver.

What is the general name of the process by which tea-leaves are separated from prepared tea?

“The properties of the product are different from those of the constituents”. State whether this statement best describes an element, a compound or a mixture.

‘A substance has a definite volume but no definite shape’. State whether this substance is a solid, a liquid or a gas.

Give the formulae of the compounds formed from the following set of element:
Carbon and hydrogen.