Chapter Notes

Series vs parallel circuits — what stays the same, what divides, both resistance formulas and one pair of resistors worked through each way.

Molarity vs molality — litres of solution against kilograms of solvent, why only one changes with temperature, and how to convert between them.

Ionic vs covalent bonds — electrons transferred against electrons shared, how each forms in NaCl and in water, and the properties that follow from it.

Distance vs displacement — path length against the straight line from start to finish, with the 3-4-5 walk, the half-circle and the round trip worked out.

Mass vs weight — amount of matter against the pull of gravity on it, kilograms against newtons, and why 60 kg weighs 588 N on Earth but about 98 N on the Moon.

Ionic, covalent and coordinate bonds, Lewis structures, VSEPR shapes, hybridisation and molecular orbital theory for Class 11 — each with the examples examiners use and the rules for predicting shape.

Debit vs credit explained without the confusion — what each does to assets, liabilities, capital, income and expenses, with a table, a memory rule and worked entries.

List vs tuple in Python compared — mutability, syntax, speed, memory, methods, when to use which — with runnable examples and the Class 12 exam questions on it.

Mitosis vs meiosis compared in a table — number of divisions, daughter cells, chromosome number, crossing over, where each happens — and the questions examiners set on it.

Speed vs velocity — scalar vs vector, distance vs displacement, when they are equal, and the round-trip and circular-motion examples that show why average velocity can be zero while average speed is not.

Stack vs queue — LIFO vs FIFO, the operations, where each is used, a Python implementation of both, and the Class 12 and GATE questions that test them.

The golden rules and the modern rules of debit and credit, then the 12 journal entries every Class 11 and CA Foundation student is tested on — each with the reasoning written out.

Class 11 notes on photosynthesis in the order the chapter is taught — pigments, the light reaction, photophosphorylation, the Calvin cycle, C4 and CAM, and the limiting factors.

What recursion is, how the call stack unwinds, and five worked programs — factorial, Fibonacci, sum of digits, binary search, Tower of Hanoi — with the traces examiners expect.