Many "SSC Preparation" or "Science by Kajal Mam" groups share updated PDFs regularly.

pH scale, indicators, and common uses. Metals and Non-Metals: Properties, ores, and metallurgy. Organic Chemistry: Hydrocarbons, alcohols, and polymers.

While many platforms offer these notes, it is important to find a clean, updated version. You can generally find these PDFs through:

She starts from the very basics (Atoms and Molecules) and goes up to advanced organic chemistry.

Trends in the periodic table, electronegativity, and atomic radius. Chemical Bonding: Ionic, covalent, and coordinate bonds.

Kajal Mam is a renowned educator in the field of General Science. With years of experience in coaching for competitive exams, she has mastered the art of breaking down complex chemical reactions and periodic table trends into easy-to-understand snippets. Her teaching often focuses on "exam-oriented" content—meaning she teaches exactly what is likely to appear in the paper.