Question

Which of the following is a reversible change?
A.Curdling of milk
B.Ripening of fruits
C.Melting of ice
D.Burning of wood

Answer 1

Hint: A reversible process in thermodynamics is one in which the direction of the process may be reversed to return the system to its initial state by generating tiny changes to some feature of the system's surroundings. The system is in thermodynamic equilibrium with its surroundings during the whole reversible process. It has no effect on the system or the environment now that it has been reversed.

Complete answer:
A reversible change is one that can be reversed or undone. A reversible reaction is one in which the chemicals used to start the reaction may be recovered. A reversible alteration may alter the appearance or feel of a material, but it does not generate new materials. Dissolving, evaporation, melting, and freezing are examples of reversible processes.
Changes are a random or unpredictable phenomenon that might be good or bad depending on your perspective. Every day, we observe many items changing around us, such as ice melting, food cooking, and so on. In some situations, you will receive the original ingredient, while in others, you will not. Some changes are gradual, while others are rapid; some are natural, while others are man-made. Many changes may be observed around us, such as the growth of plants on your balcony, the change in color, and the drying of leaves.
Reversible modifications are any alterations that can be reversed or are a temporary conversion. Reversible reactions are those that are reversible in nature. A material is changed into a different form in this reaction, but no new chemical is created. Melting, boiling, evaporation, freezing, condensation, and disintegration are examples of reversible transformations. Melting wax, freezing ice, and boiling water that evaporates as steam and condenses back to water are a few examples.

Hence option C is correct.

Note:
Irreversible alterations, in contrast to reversible changes, are permanent. Reactants combine to produce a completely new compound that cannot be undone. Heating, burning, combining, and powdering are only a few examples of operations that result in permanent alterations. Cooking a raw egg that cannot be transformed back to its original form is a typical observed example. Another example is ash produced by the burning of paper or other materials.