Chemistry, asked by Anonymous, 6 months ago

State main characteristics of chemical reaction. give at least one example in each case
please answer this fast

Answers

Answered by swetha9660

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.

Answered by hninwaditun03

0

Answer:

The product can't change back to reactant.

Energy is produced.

Explanation:

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