The correct acidity order of the following compounds is:

Which of the following compounds on hydrolysis gives reactant $(A)$?

Write the chemical reactions of acetic acid $(CH_3COOH)$ with the following reagents:
$(i)$ Excess $Cl_2$ $+$ Red $P$ followed by $H_2O$
$(ii)$ Heating with sodalime $(NaOH + CaO)$
$(iii)$ Electrolysis of its sodium salt ($Kolbe's$ electrolysis)
$(iv)$ Heating with excess ammonia $(NH_3)$
$(v)$ Reaction with $PCl_5$
$(vi)$ Reaction with $PCl_3$
$(vii)$ Reaction with $SOCl_2$
$(viii)$ Heating with $P_2O_5$
$(ix)$ Reaction with $NaOH_{(aq)}$
$(x)$ Reaction with $NaHCO_{3_{(aq)}}$
$(xi)$ Reaction with $Na$ metal
$(xii)$ Reaction with $LiAlH_4$ / ether or $BH_3$
$(xiii)$ Reaction with ethanol $(C_2H_5OH)$ in the presence of $H_2SO_4$ or $HCl$ gas

$4-$methylbenzene sulphonic acid reacts with sodium acetate to give:

Calculate the value of $x + \text{molecular mass of } (C)$,where $x$ is the number of moles of $PhMgBr$ consumed in reaction $(a)$ and $(C)$ is the gas evolved in reaction $(b)$.
$(a)$ $3\text{-hydroxy-5-formylbenzoyl chloride} + x \ PhMgBr \xrightarrow{\text{excess}} (A)$
$(b)$ $2,5\text{-dioxocyclohexanecarboxylic acid} \xrightarrow{\Delta} (B) + (C) \uparrow$

Number of equivalents of Grignard reagent $(x)$ used in the reaction is