The correct decreasing order for acidic strength is

When $CH_3COOH$ reacts with $CH_3MgX$,what is the primary product formed?

$A$ compound $(A)$ has the molecular formula $C_2H_4O_2$ and it gives the following reactions:
$(i)$ Addition of the above compound to a sodium carbonate solution gives effervescence of $CO_2$ gas and forms compound $(P)$.
$(ii)$ When compound $(P)$ is heated with sodalime,it gives gas $(Q)$. Identify $(A)$,$(P)$,and $(Q)$ and provide the reactions.

Ethyl acetate at room temperature is a

Which is the strongest acid? ($pK_a$ value is given in the bracket)

Identify the product obtained in the following reaction:
$(CH_3 CO)_2 O \stackrel{H_2 O}{\longrightarrow} \text{Product}$