Question

Identify the changes that can be reversed?​

Answer 1

Identify the changes that can be reversed?

A. Cooking of food  

B. Setting of curd  

C. Melting of ice

D. All of the above

Explanation:

• The correct answer is the melting of ice. (option c)

• Reversible changes are changes that can be undone or reversed.

• The substance we used at the beginning of any reaction can be brought again without any changes.

• Cooking is done with raw foods. Once the cooking is done, we cannot get back the raw foods from that reaction.

• Curd is set with the curdled milk. Once the curd is made, we cannot get the milk back from that reaction.

• But if ice is melted, the water can be frozen again, and we can the same ice from it.

• Some reversible reactions are dissolving, evaporation, melting, and freezing.

Answer 2

Reversible & Irreversible Changes

• Reversible Change is the change which can be reversed.  In this type of process, the substance can get back to its initial or original state. Chemical properties do not change in the case of reversible actions.
• Irreversible Change is the change which cannot be reversed. In this type of process, the substance cannot get back to its initial or original state. Chemical properties gets changed in the case of irreversible actions.

Examples of changes which can be reversed :-

• Melting of ice
• Boiling of water
• Melting of chocolate

Examples of changes which cannot be reversed :-

• Cutting of fruits
• Cooking food
• Boiling of egg
• Burning of paper