A water insoluble organic mixture contained following compounds.
(1) `=`Benzoic acid (2) `=` Salicylaldehyde
(3) `=` p-Hdroxybenzaldehyde
(4) `=` a-Naphthylamine (5)`=` Naphthalene
The following sequence of reagents are used to separate this mixture

Answer

X-U,Y-1,Z-5,W-2

Explanation

`X=4`: a-Napthylamine is soluble in aqueous `HCl` solution.
`Y=1`, Benzoic acid is soluble in aqueous `NaHCO_(3)` solution.
`Z=`: Naphthalene insolyble in aqueous `HCl, NaoH` or `NaHCO_(3)` solution.
`W=2`: Salicylaldehyde has lower b.p. than `p-` hydroxy benzaldehyde