Mnemonic 1 — Silver Halides (Color + NH3 Solubility)

"White Cl Solves, Pale Br Partially, Yellow I Is Impossible"

• AgCl → White → Solves (dissolves in dilute NH3)
• AgBr → Pale yellow → Partially (dissolves in conc. NH3 only)
• AgI → Yellow → Impossible (does not dissolve in NH3 at all) Colors get darker Cl → I. Solubility decreases Cl → I.

Mnemonic 2 — Cation Group Reagents in Order

"Happy Harry Always Has Candy More"

• Group I: HCl (Happy)
• Group II: H2S/acid (Harry)
• Group III: Ammonium hydroxide + NH4Cl (Always)
• Group IV: H2S/base (Has)
• Group V: Carbonate (NH4)2CO3 (Candy)
• Group VI: Mg2+, NH4+ — no group reagent (More)

Mnemonic 3 — N and S Together (Critical NEET Trap)

"When N and S are together, they make SCN (a thief stole CN) — FeCl3 sees Blood Red, not Blue." CN- + S2- → SCN- (thiocyanate) FeCl3 + SCN- → Fe(SCN)3 (blood-red) This is the single most-tested practical chemistry concept.

Mnemonic 4 — Iodoform Test Positives

"My Ketone Eats Alcohol Selectively"

• Methyl ketones (CH3CO-R) ✓
• Ketone: methyl only (non-methyl ketones ✗)
• Ethanol (C2H5OH) ✓ (oxidized to acetaldehyde first)
• Acetaldehyde (CH3CHO) ✓ (has CH3CO group)
• Secondary alcohol with CH3CHOH → oxidized to methyl ketone ✓

Mnemonic 5 — KMnO4 Titration

"Self Pink at 65, no indicator please"

• Self-indicating (no indicator needed)
• Pink endpoint (faint, persistent)
• 60–70 °C (around 65 °C as average)
• H2SO4 acidic medium (not HCl)