In the Victor-Meyer’s test ,the colors given by 1°, 2° and 3° alcohols are respectively.

In the Victor-Meyer’s test, the primary and secondary alcohols give and Blue color respectively, while tertiary alcohols give colorless solution.

Primary alcohol: ${\mathrm{RCH}}_2\mathrm{OH}\stackrel{\mathrm{P}+{\mathrm{I}}_2}{\to }{\mathrm{RCH}}_2\mathrm{I}\stackrel{{\mathrm{AgNO}}_2}{\to }\mathrm{R}-{\mathrm{CH}}_2\mathrm{N}{\mathrm{O}}_2\stackrel{{\mathrm{HNO}}_2}{\to }$

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Tertiary alcohol: