Question

Give an example of a chemical change for each of the following. (2)

a. Sound is produced

b. A gas is produced

c. Light is produced

d. A change in taste is observed​

Answer 1

Answer:

Given Below

Explanation:

1) Reaction between copper sulphate solution and zinc metal. The blue colour of the copper sulphate solution fades away and a red-brown metallic copper is formed,

2) Reaction between baking soda and vinegar. Baking soda on reaction with vinegar produces carbon dioxide.

3) Burning of crackers.

4) Reaction of silver nitrate and potassium chloride. A precipitate of silver chloride is formed.

5) When water is heated above boiling point, it converts into vapours.

Water droplets appear on the outside of a bottle containing cold water.