Ssc: Chemistry Notes

The SSC science syllabus is based on the Class 6–10 NCERT curriculum. Here is a detailed breakdown of the major chemistry areas:

Atoms of the same element with the same atomic number but different mass numbers (e.g., Protium, Deuterium, Tritium).

: Unsaturated hydrocarbons with at least one double bond. General formula: CnH2ncap C sub n cap H sub 2 n end-sub

pH scale, Chemical formulas, Common names. Metals and Non-metals: Metallurgy, Alloys, Important ores.

Formed by the sharing of electrons between non-metals (e.g., ). These generally have lower melting points. chemistry notes ssc

Separating components of ink, dyes, or blood based on their different absorption rates. 2. Atomic Structure Atoms are the basic building blocks of matter. Subatomic Particles Electron: Discovered by J.J. Thomson . Negative charge ( C). Mass is negligible.

Metals that melt when kept on the human palm due to very low melting points.

This is one of the most frequently tested topics. The measures how acidic or basic a substance is, ranging from 0 (most acidic) to 14 (most basic), with 7 being neutral.

High-quality versions often include "One-Liners" or bullet points for quick memorization of facts, such as identifying the "Father of Modern Chemistry" (Lavoisier). Why These Notes Are Effective The SSC science syllabus is based on the

Hexagonal planar layered structure. Soft, slippery, good conductor of electricity due to free electrons. Used as a lubricant and pencil lead.

: Pure substances containing only one type of atom (e.g., Hydrogen, Iron).

When moving across a period or down a group, properties change predictably: Moving Left to Right (Across a Period) Moving Top to Bottom (Down a Group) Decreases (due to increased nuclear charge) Increases (due to addition of new electron shells) Ionization Energy Electron Affinity Electronegativity Metallic Character Key Groups to Remember

Superheated gas consisting of highly ionized electrons and positive ions. Found in stars and neon signs. General formula: CnH2ncap C sub n cap H

Modern Periodic Law states that properties of elements are periodic functions of their . Groups: 18 vertical columns. Periods: 7 horizontal rows. Alkali Metals: Group 1 (Highly reactive).

Atoms of different elements having the same mass number but different atomic numbers (e.g., Argon and Calcium

Chemistry is an essential subject in SSC exams, and it carries a significant weightage in the overall syllabus. The chemistry section in SSC exams includes questions from inorganic chemistry, organic chemistry, and physical chemistry. The questions are designed to test the candidate's understanding of chemical concepts, reactions, and formulas.