$\text{NaC}l+{\text{H}}_2\text{O}\to \text{X}$

i) Formation of X is a chemical change ii) ‘X’ is an example for compound

iii) ‘X’ does not contain NaCl                iv) ‘X’ is tasteless

When solid sodium chloride (NaCl) is mixed with water (H₂O), it dissolves to form an aqueous solution of sodium chloride:

NaCl(s) + H2O(l) → NaCl(aq)

This process results in the formation of a salt solution, where the NaCl molecules dissociate into sodium ions (Na⁺) and chloride ions (Cl^-) in the presence of water. The interaction between NaCl and H₂O is classified as a physical change because no new substance is created during the dissolution process. The composition of sodium chloride remains unchanged, and the solution retains the salty taste characteristic of NaCl.

Analyzing the given options:

1. Formation of X is a chemical change: Incorrect. The dissolution of NaCl in H₂O is a physical change, as the chemical composition of NaCl remains the same.
2. 'X' is an example of a compound: Correct. Sodium chloride (NaCl) is a compound formed by ionic bonds between sodium and chloride ions.
3. 'X' does not contain NaCl: Incorrect. The aqueous solution contains NaCl in dissociated form as Na⁺ and Cl^-.
4. 'X' is tasteless: Incorrect. The solution has a distinctly salty taste due to the presence of dissolved NaCl.

In conclusion, the interaction of NaCl and H₂O demonstrates a simple dissolution process leading to a saline solution. This highlights the physical transformation of NaCl when mixed with H₂O, showcasing its solubility and retention of taste.