Question

3. When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place. short answers ​

Answer 1

Answer:

When a candle burns, both physical and chemical changes take place. Physical change is the melting of the wax. Chemical change is the burning of gas with the evolution of CO2. (2) Digestion of food is another example where both physical and chemical changes occur simultaneously

Answer 2

When a candle burns, both physical and chemical changes take place.

· Physical change is the melting of the wax.

· Chemical change is the burning of gas with the evolution of CO2.

(2) Digestion of food is another example where both physical and chemical changes occur simultaneously.

· Physical change is the breakdown of larger food molecules into simpler ones.

· The chemical change is the digestion of food by the action of HCl and enzymes