🧪 NEET Chemistry Smart Tool

🔹 **Oxidation States Trick** Oxygen = –2 (except peroxides –1) Hydrogen = +1 (except metal hydrides –1)

🔹 **pH Memory Trick** pH ↓ → Acidity ↑ pH ↑ → Basicity ↑

🔹 **Periodic Trend Shortcut** Atomic size ↓ → Ionization energy ↑

Physical Chemistry

Molarity (M) = moles / volume (L)

pH = –log[H⁺]

ΔG = ΔH – TΔS

Organic Chemistry

SN1 → Carbocation → Racemization

SN2 → Backside attack → Inversion

Inorganic Chemistry

F > O > N > Cl (Electronegativity)

d⁵ & d¹⁰ → More stable