Question

give two characteristic each of the physical and chemical changes ???



Plz Give This Answer For Std 6th​

Answer 1

In a physical change, no new substance is formed. A chemical change is always accompanied by one or more new substance(s). Physical change is easily reversible i.e original substance can be recovered. Chemical changes are irreversible i.e. original substance cannot be recovered.

Answer 2

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¤ Two characteristics of Physical changes :-

1. They are reversible changes.

2. They are temporary changes.

some more characteristics :-

☆ A Physical change affects only physical properties i.e. shape, size, etc.

☆A physical change involves very little to no absorption of energy.

☆In a physical change, no new substance is formed.

For example :- freezing of water, melting of wax, boiling of water, etc.

¤ Two characteristics of chemical changes :-

1. They are irreversible changes.

2. They are permanent changes.

some more characteristics :-

☆ Chemical change both physical and chemical properties of the substance including its composition.

☆ During a chemical reaction, absorption and evolution of energy take place.

☆ A chemical change is always accompanied by one or more new substance(s).

For example :- digestion of food, burning of coal, rusting.

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