Fill in the blanks:

(a) Brass is a solid-solid …………… mixture.

(b) The method used to separate sawdust and sand is …………… .

(c) Kerosene oil and water are …………… liquids.

(d) Atomicity is the number of atoms in a molecule of …………… .

Write true or false against the following statements .

(a) The elements present in a compound can be obtained by simple physical methods.

(b) The properties of components are retained in a mixture.

(c) Common salt is separated from sea water by evaporation.

(d) A mixture has a definite chemical formula.

Classify the following substances into compounds and mixtures:

Carbon dioxide, air, water, milk, common salt, blood, fruit juice, iron sulphide, brass.

Give one example for each of the following types of mixtures.

(a) solid-solid homogeneous mixture

(b) solid-liquid heterogeneous mixture

(c) miscible liquids

(d) liquid-gas homogeneous mixture