Question

The fixed number of water molecules attached loosely with one molecule of a substance is known as water of

• A. Activation
• B. crystal
• C. evaporation
• D. crystallization

Answer 1

The correct option is D

crystallization

The explanation for the right answer:

Option D: Crystallisation

The water of crystallization:

• Water of crystallization is the fixed number of water molecules that are present in one formula unit of salt.
• They give the crystals their shape.
• For example:$\mathrm{Copper}\mathrm{sulphate}\left({\mathrm{CuSO}}_{4}7{\mathrm{H}}_2\mathrm{O}\right)$.
• Therefore, Option D is the correct answer.

The explanations for the wrong answers:

Option A: activation

• Molecules of reactants get converted into products after getting some extra energy which Is known as activation energy.
• So, option A is the wrong answer.

Option B: Crystal

• A solid substance in which atoms or molecules are arranged in a repeating pattern is known as a crystal.
• Crystals are made by crystallization.
• So, option B is the wrong answer.

Option C: evaporation

• The process by which water changes from a liquid state to a gaseous or vapor state is known as evaporation.

• So, option C is the wrong answer.

Conclusion:

So, Crystals having a fixed number of water molecules are known as the water of crystallization.

Therefore, Option D is the correct answer.