Which of the following is a reversible change?

a)
Curdling of milk
b)
Ripening of fruits
c)
Melting of ice
d)
Burning of wood
Correct answer is option 'C'. Can you explain this answer?

Question

Which of the following is a reversible change?a)Curdling of milkb)Ripening of fruitsc)Melting of iced)Burning of woodCorrect answer is option 'C'. Can you explain this answer?

Answer

It is a reversible change in which melted ice can freeze again by decrease in temperature.... hence c is correct

Answer

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

Let me explain how.

A reversible change is a change that can be undone or reversed such as: dissolving. melting. freezing. evaporation.

If a change cannot be undone, it is referred to as irreversible. New materials are always formed in irreversible changes. Burning, cooking, and frying are example of irreversible changes.

So, let us check option wise:-

Option a : Curdling of milk cannot be undone so it is irreversible.
Option b : Ripening of fruits cannot be undone so it is irreversible.
Option c : Melting of ice can be done so it is reversible.
Option d : Burning of wood cannot be undone so it is irreversible.

So, now we have checked every option and we got the answer as option (c) which is melting of ice.

Answer

Reversible Change: Melting of Ice

Explanation:
Melting of ice is a reversible change. Reversible changes are those changes that can be undone and the original substance can be obtained again.

Key Points:
- Melting of ice is a physical change in which solid ice converts into liquid water.
- When heat is applied to ice, the molecules gain energy and start moving faster, causing the solid ice to melt into liquid water.
- This change is reversible because if the liquid water is cooled again, it will solidify and turn back into ice.
- The process of melting and freezing of ice is a cycle that can be repeated multiple times.
- This demonstrates that the change from solid ice to liquid water is reversible.

Examples of Reversible Changes:
- Melting and freezing of ice: As explained above, ice can be melted into water and water can be frozen back into ice.
- Evaporation and condensation of water: Water can evaporate and form water vapor, and then the water vapor can condense back into liquid water.
- Dissolving and crystallizing of sugar: Sugar can dissolve in water and form a solution, and then the water can be evaporated to obtain sugar crystals again.

Examples of Irreversible Changes:
- Curdling of milk: When milk curdles, it forms lumps due to the separation of solid curds and liquid whey. Once milk curdles, it cannot be reversed to its original state.
- Ripening of fruits: Fruits undergo chemical changes during ripening, such as the breakdown of starch into sugars. Once a fruit ripens, it cannot return to its unripe state.
- Burning of wood: When wood burns, it undergoes a chemical change and turns into ash, carbon dioxide, and water vapor. This change is irreversible.

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