Wrong: "3° amine is most basic in all conditions" — Only true in gas phase. In water, 2° > 1° > 3° due to solvation. This is the single most tested trap in NEET amine questions.

Wrong: "Gabriel synthesis makes aniline" — ArX does not undergo SN2 (partial π character of C–X bond in arenes blocks backside attack). Gabriel = 1° aliphatic amines ONLY.

Wrong: "Hoffmann product has same carbons as amide" — The product amine has ONE FEWER carbon. $RCONH_{2}$ → $RNH_{2}$; the carbonyl carbon leaves as $Na_{2}CO_{3}$. Students confuse this with nitrile reduction (+1C).

Wrong: "Carbylamine test distinguishes 1°, 2°, and 3° amines" — It only identifies 1° amines (foul smell). 2° and 3° give no isocyanide and no smell. For distinguishing all three, use Hinsberg test.

Wrong: "Sandmeyer uses metallic copper powder" — Sandmeyer uses Cu(I) halide SALTS (CuCl, CuBr, CuCN). Gattermann uses metallic Cu° powder.

Wrong: "Diazonium salts are stable at room temperature" — They decompose rapidly above 5 °C; must be kept at 0–5 °C and used immediately.

Wrong: "Phenol undergoes azo coupling in acidic medium" — Phenol requires ALKALINE medium (to form reactive phenoxide). Aniline coupling requires WEAKLY ACIDIC medium (neutral –$NH_{2}$ form is reactive).

Wrong: "Aniline is more basic than $NH_{3}$" — Aniline (pKb ≈ 9.38) is MUCH WEAKER than $NH_{3}$ (pKb ≈ 4.74) because resonance delocalises the lone pair into the benzene ring.

Wrong: "The Schiemann reaction uses a copper catalyst" — Schiemann uses $HBF_{4}$ (no copper). It is a purely thermal decomposition of diazonium tetrafluoroborate.