$PhCHO + Ph \cdot CHO \xrightarrow[in\,\,{{D}_{2}}O]{NaOD} A + \begin{matrix} O \\ || \\ Ph-C-{{O}^{-}} \\ \end{matrix}$$\left( Ph\right.$ is $\left.- C _{6} H _{5}\right)$
$(ii)$ $CH _{3} COOH$
$(iii) $ $C _{6} H _{5} COOH$
$(iv)$ $CH _{3} CH _{2} COOH$
$ PK _ {a} $ મૂલ્યનો યોગ્ય ક્રમ કયો છે ?
$C{H_3}COON{H_4}\xrightarrow{\Delta }X\,\xrightarrow{{{P_2}{O_5}}}\,Y\,\xrightarrow{{{H_2}O/{H^ + }}}\,Z$