Question

Q24. Differentiate between physical change and chemical change.​

Answer 1

Answer:

Explanation:

         Physical Change                                    Chemical Change

When a substance undergoes a          When a substance undergoes a

physical change, its composition         chemical change, its molecular

remains the same despite its               composition is changed

molecules being rearranged.               entirely. Thus, chemical

                                                              changes involve the formation                                                  

                                                               of new substances

Physical change is a temporary          Chemical change is a permanent change.                                                 change.

Physical change affects only               Chemical change affects both  

physical properties i.e. shape,            physical and  chemical properties

size, etc.                                                of the substance including its

                                                              composition.

A physical change involves very       During a chemical reaction, absorption  

little to no absorption of energy.      and evolution of energy take place.

Some examples of physical              A few examples of chemical change

change are freezing of water,           are digestion of food, burning of coal,

melting of wax, boiling of                  rusting, etc.

water, etc.

Hope It helps..