Question

In which of the following, the identity of the initial substance remains unchanged?

• A. Curdling of milk
• B. Formation of crystals by process of crystallization
• C. Fermentation of grapes
• D. Digestion of food

Answer 1

The correct option is B

Formation of crystals by process of crystallization

Explanation for the correct option:

Option(B): Formation of crystals by process of crystallization

• Crystallization can be defined as the process of solidification of a liquid substance into a highly structured solid whose atoms or molecules are placed in a perfect three-dimensional crystal lattice.
• In the formation of crystals by the process of crystallization, the composition of the initial substance does not change but it only gets crystallized.

Explanation for the incorrect option:

Option(A): Curdling of milk

• In the process of curdling milk, the initial substance which is used as the milk gets converted into curd.
• Hence the given Option is the incorrect one.

Option(C):Fermentation of grapes

• For the fermentation of grapes process, the initial substance, grapes change into an alcoholic beverage.
• Hence in the given Option, the identity of the initial substance does not remain unchanged.

Option(D):Digestion of food

• In the process of digestion of food, the initial substance food gets digested into to give essential nutrition and energy to our body.
• Thus, the given Option does not satisfy the concept.

Hence, among the following options, the identity of the initial substance remains unchanged in option(B) the Formation of crystals by process of crystallization.