Chemistry - Salt Analysis Question with Solution | TestHub

Identify X: Sodium salt X is NaNO₂ (sodium nitrite). It reacts with FeSO₄/HCl to form the brown ring complex $[Fe(H_{2}O{)}_5(NO){]}^{2+}$, which has 3 unpaired electrons ($\mu =\sqrt{15}$ B.M.).

Identify Z₁ and Z₂: Reaction of NaNO₂/HCl (nitrous acid) with ethylamine gives Z₁ = CH₃CH₂OH (ethanol) and N₂ gas. Reaction with aniline at ice-cold temperatures gives Z₂ = C₆H₅N₂Cl (benzene diazonium chloride).

Evaluate Options: Ethanol (Z₁) reacts with Na to produce H₂ and contains oxygen, but has no nitrogen. Benzene diazonium chloride (Z₂) contains nitrogen and gives a dye (coloration) with aniline, but contains no oxygen and doesn't produce H₂ with Na.

Conclusion: Since none of the properties in (A), (B), (C), or (D) are shared by both compounds, they are all "NOT common" features.