Identify the reaction type

Ethyl acetate is an ester: $CH_3COOC_2H_5$

Aqueous sodium chloride is simply a neutral salt solution: $NaCl(aq)$

Esters undergo hydrolysis only under suitable conditions such as:

• acidic hydrolysis: dilute acid + water
• basic hydrolysis: strong base like $NaOH$

Here, only aqueous $NaCl$ is present, which is neutral and does not hydrolyze ethyl acetate appreciably.

Check each option

Option A: $CH_3COOC_2H_5 + NaCl$

• This means no chemical reaction occurs on mixing.
• This is correct.

Option B: $CH_3Cl + C_2H_5COONa$

• This would require cleavage and rearrangement not caused by $NaCl(aq)$.
• Also, the carbon skeleton does not match ester hydrolysis chemistry.
• Incorrect.

Option C: $CH_3COCl + C_2H_5OH + NaOH$

• Formation of acid chloride $CH_3COCl$ from an ester does not occur with aqueous $NaCl$.
• $NaOH$ is not even a reactant here.
• Incorrect.

Option D: $CH_3COONa + C_2H_5OH$

• This is alkaline hydrolysis (saponification) of ethyl acetate: $CH_3COOC_2H_5 + NaOH \rightarrow CH_3COONa + C_2H_5OH$
• But the reagent is $NaCl$, not $NaOH$.
• Incorrect.

Conclusion

Since aqueous sodium chloride does not react with ethyl acetate under ordinary conditions, the resultant mixture contains the same substances.

Therefore, the correct option is: $\boxed{A}$