Give an example of each:

Write the decomposition reactions for the following:

(i) Metallic oxide on heating forms metallic oxide and oxygen.

(ii) A compound on heating gives a gas which turns lime water milky.

(iii) A white hydroxide on heating gives a yellow residue and water vapours.

Write the reaction for the decomposition of a nitrate which does not yield nitrogen dioxide on heating.

Name:

(a) two coloured oxides that do not decompose on heating.

(b) a carbonate that is stable to heat

(c) an oxide formed during thunder and lighting.

(d) the compound formed when phosphorus and oxygen combines.

Which of the following is not a characteristic of a chemical change?

(i) It is irreversible

(ii) No net energy change is involved

(iii) New substance is formed

(iv) Involves absorption or liberation of energy