General Science is the knowledge section of RRB ALP under CEN 01/2026. The CEN defines it as Physics, Chemistry and Life Sciences of Class 10 level in CBT-1, and CBT-2 Part A adds Basic Science and Engineering: units and measurements, mass, weight and density, work, power and energy, speed and velocity, heat and temperature, basic electricity, levers and simple machines, engineering drawing, occupational safety and health, environment education and IT literacy. The notes on this page are GK24's topic-wise GK notes for RRB ALP, written as short facts, formulas and tables so that a topic can be revised in one sitting. Physics notes cover motion, force, gravitation, work and energy, sound, light, electricity and magnetism; Chemistry notes cover matter, atoms and molecules, chemical reactions, acids, bases and salts, metals and non-metals, carbon compounds and the periodic table; Life Sciences notes cover the cell, life processes, control and coordination, reproduction, heredity, diseases and the environment. Topics that appear in both CBT-1 General Science and CBT-2 Basic Science and Engineering, such as units, energy, heat and electricity, are marked so that one reading serves two papers. Each note ends with the previous-year questions asked on it, and the quizzes on this site draw from the same topics, so a weak quiz score points back to the note to reread.
