Question

Introduction for characteristics of chemical reaction​

Answer 1

Explanation:

Some chemical reactions are characterised by the evolution of gas. For Ex:1)Reaction between zinc and dilute sulphuric acid to form hydrogen gas. 2)Reaction between sodium carbonate and dilute hydrochloric acid to form carbon dioxide gas. Some chemical reactions are characterised by the formation of precipitate.

Answer 2

Answer:

Some chemical reactions are characterised by the evolution of gas.

• For Ex:
• 1)Reaction between zinc and dilute sulphuric acid to form hydrogen gas.
• 2)Reaction between sodium carbonate and dilute hydrochloric acid to form carbon dioxide gas. Some chemical reactions are characterised by the formation of precipitate.