Identify the product of the following reaction:

Arrange the following compounds in the correct decreasing order of their acidic strength:
$(I) HCOOH$
$(II) CH_3COOH$
$(III) CH_3CH_2COOH$
$(IV) C_6H_5COOH$

The reaction $CH_3COOH + Cl_2 \xrightarrow{P} ClCH_2COOH + HCl$ is called

Compound$(s)$ which will liberate carbon dioxide with sodium bicarbonate solution is/are:
$A = \text{2,4,6-triamino phenol}$
$B = \text{Benzoic acid}$
$C = \text{Picric acid (2,4,6-trinitrophenol)}$

The number of moles $(x)$ of Grignard reagent $(CH_3MgI)$ consumed in the reaction of dimethyl phthalate with excess $CH_3MgI$ followed by acidic workup $(H^+)$ to form the product is:

The correct order of acid strengths of benzoic acid $(X)$, peroxybenzoic acid $(Y)$ and $p-$nitrobenzoic acid $(Z)$ is