Acid do not show acidic behavior in the absence of water because in dry state they can't ionise...but ionisation is necessary ....as acids release H+ ions only in water...

Acidic Behavior of Acids in the Absence of Water
Understanding the concept of acids not showing acidic behavior in the absence of water requires a closer look at the properties of acids.

Acid Dissociation in Water
- Acids are substances that release hydrogen ions (H+) when dissolved in water.
- This process is known as dissociation, where the acid molecule breaks apart into H+ ions and an anion.

Role of Water in Acid Behavior
- Water molecules surround the H+ ions, stabilizing them and preventing them from recombining with the anions.
- The presence of water allows for the conductivity of the solution and the characteristic sour taste and corrosive properties associated with acids.

Absence of Water and Acidic Behavior
- In the absence of water, acids do not dissociate into H+ ions and anions.
- Without water to stabilize the H+ ions, they tend to recombine with the anions, reforming the original acid molecule.
- This lack of dissociation means that acids do not exhibit their typical acidic properties, such as conductivity and corrosiveness, in the absence of water.

Conclusion
In conclusion, the behavior of acids is heavily dependent on the presence of water. Without water to facilitate dissociation and stabilize the released H+ ions, acids do not show their characteristic acidic properties. This highlights the crucial role of water in the behavior of acids and the importance of understanding the interactions between acids and solvents.