Every dense NCERT chapter compresses into something you can hold in your head under exam pressure. Biology and Chemistry get short, respectful mythology-themed narratives used purely as memory pegs; Physics gets tight, printable mnemonic charts. Everything here also lives inline inside its source chapter — this page is just the fast-scan index.
Used strictly as a recall device, not as a reinterpretation of the source stories.
Two equal halves merging into one whole — a memory peg for symmetric, non-polar covalent bonding.
ChemistryA willing transfer of tribute between two unequal parties, framing ionic bond formation as complete electron transfer.
ChemistryA king holding court with a fixed number of courtiers — the coordination number and coordinate bond, in one image.
ChemistryWhy eg orbitals feel more "crowded" than t₂g in an octahedral field — mapped onto courtiers standing on and off the axes.
BotanyNucleus as palace, mitochondria as Agni's chambers, ribosomes as Vishwakarma's workshop, Golgi as Kubera's treasury, lysosomes as Yamraj's chamber.
BotanyOne loud heir, one quiet heir whose line never disappears — Mendel's Law of Segregation as a succession story.
BotanyThree possible ledger entries, only ever two held at once — I^A, I^B and i mapped onto a treasurer's account.
ZoologyThe 28-day cycle mapped onto the Moon's own phases: new moon, waxing, full moon ovulation, waning luteal phase.
Still-connected vs isolated capacitor behaviour, resolved into one small table.
PhysicsAxial dipole field is twice the equatorial field — and points the opposite way to remember which is which.
PhysicsThe one-line rule that resolves almost every ideal-pulley tension question.
PhysicsApparent weight in an accelerating lift, reduced to a single memorable line.
Physics/ZoologyThe pump's exchange ratio, and why it leaves the inside of the cell net negative.
Physics/Zoology"Cerebrum thinks, cerebellum balances, medulla keeps you alive" — and why that order matters clinically.
Kingdom → Phylum → Class → Order → Family → Genus → Species. Broadest to narrowest, in the exact sequence NCERT's The Living World and every classification question after it assumes you already know cold.
| Prefix | Symbol | Factor |
|---|---|---|
| giga | G | 10⁹ |
| mega | M | 10⁶ |
| kilo | k | 10³ |
| centi | c | 10⁻² |
| milli | m | 10⁻³ |
| micro | µ | 10⁻⁶ |
| nano | n | 10⁻⁹ |
| pico | p | 10⁻¹² |
Memory hook: "Great Monkeys Kick Cars, Miss Nearly Perfectly" — Giga, Mega, Kilo, (base), Centi, Milli, (micro), Nano, Pico, straight down the powers of ten.