Isomeric amines with molecular formula \( \mathrm{C_8H_{11}N} \) give the following tests
Isomer (P) ⇒ Can be prepared by Gabriel phthalimide synthesis.
Isomer (Q) ⇒ Reacts with Hinsberg’s reagent to give sold insoluble in \( \mathrm{NaOH} \).
Isomer (R) ⇒ Reacts with \( \mathrm{HONO} \) followed by \( \beta \)-naphthol in \( \mathrm{NaOH} \) to give red dye.
Isomers (P), (Q) and (R) respectively are:
P Q R
