: Discovered by J.J. Thomson. Negatively charged. Revolves around the nucleus.
Indefinite shape, indefinite volume, high compressibility, and weak intermolecular forces (e.g., Oxygen, Nitrogen).
: Unsaturated hydrocarbons with at least one triple bond. General formula: CnH2n−2cap C sub n cap H sub 2 n minus 2 end-sub 8. Common Chemical Names, Formulas, and Everyday Uses chemistry notes ssc
A reaction where both oxidation and reduction happen simultaneously (e.g., Rusting of iron). 5. Acids, Bases, and Salts Sour to taste. Turn blue litmus paper red . H+cap H raised to the positive power ions in water. Examples of Organic Acids: Citric Acid: Citrus fruits (lemons, oranges) Acetic Acid: Vinegar Formic Acid / Methanoic Acid: Ant stings Tartaric Acid: Tamarind, grapes Lactic Acid: Sour milk, curd Oxalic Acid: Tomatoes, spinach (used to remove ink stains) Bitter to taste and soapy to touch. Turn red litmus paper blue . OH−cap O cap H raised to the negative power ions in water. Examples: Sodium Hydroxide ( NaOHcap N a cap O cap H - Caustic Soda), Calcium Hydroxide ( - Slaked Lime). Developed by Sorensen to measure acidity or alkalinity. pH < 7: Acidic pH = 7: Neutral (Pure water) pH > 7: Basic Crucial pH Values to Remember Human Blood: 7.4 Gastric Juice (Stomach Acid): 1.5 – 2.0 Acid Rain: Less than 5.6 Milk: 6.5 – 6.7 6. Metals, Non-Metals, and Metallurgy
Definite shape. Definite volume. Particles are tightly packed with strong intermolecular forces. : Discovered by J
Chemistry is an essential subject for students preparing for the Staff Selection Commission (SSC) exam. The SSC exam is a competitive exam that requires a strong foundation in various subjects, including chemistry. In this paper, we will provide a comprehensive overview of chemistry notes for SSC, covering the most important topics, concepts, and formulas.
: Only mark the most crucial info that needs strict memorization—leave diagrams and examples unhighlighted to keep the page clean. 3. Pro Tips for Exam Success Revise NCERTs Revolves around the nucleus
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
Greenhouse gases trap solar radiation in the earth's atmosphere, raising its temperature. Main greenhouse gases include Carbon Dioxide ( CO2cap C cap O sub 2 ), Methane ( CH4cap C cap H sub 4 ), Water Vapor, and Nitrous Oxide ( N2Ocap N sub 2 cap O Produced when Sulfur Dioxide ( SO2cap S cap O sub 2 ) and Nitrogen Oxides ( NOxcap N cap O sub x
Increases down a group, decreases across a period.
Master SSC Chemistry: Core Notes & Exam Strategy Chemistry is a high-scoring section of the SSC General Awareness paper, typically contributing 2–3 questions per shift. Since the syllabus generally aligns with , focused revision of key definitions and "everyday life" chemistry is the most effective way to secure these marks. 1. Essential Concepts for SSC Exams