Complete the following reaction:
$[C]$ is $........$

Which of the following acids is the strongest acid?

Consider the following sequence of reactions. The major product $P$ is:

What is the main reason for the fact that carboxylic acids can undergo ionization?

$A$ 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.

The common acid used in the manufacture of rayon and plastics is