Question

Identify the type of reaction and write two examples in which
i) the reaction mixture becomes warm
ii) insoluble substance is formed
iii) colour change is seen
iv) single product is formed.

Answer 1

Answer:

1) exothermic reaction or combination reaction.

2) double displacement reaction because of they form precipitate substance which is insoluble.

3) oxidation reaction because when copper react with oxygen form copperoxide which is show black coating.

4) combination reaction.

Explanation:

examples are in ncert book of class 10 science.

Answer 2

Answer:

Exothermic reaction . Quick lime with water,. Aerobic respiration

Precipitation reaction. Eg barium chloride with sodium sulfate and silver nitrate with sodium chloride.

Oxidisation. Eg Rusting of iron and copper forming patina.

Combination reaction. Eg magnesium oxide with carbon dioxide gives magnesium carbonate. And iron with sulphur to give ferrous sulphide

Explanation:

Hope it will help you