Liquefied Petroleum Gas consists mainly of Butane and Propane . Ethyl Mercaptan is added to give it a foul smell to detect leaks.
Atoms containing the exact same number of neutrons. 3. Chemical Bonding
18 Groups (vertical) and 7 Periods (horizontal). Group 1: Alkali Metals. Group 17: Halogens (most reactive non-metals).
The modern periodic table organizes elements by increasing atomic number. It was developed by Henry Moseley. Structural Overview 7 horizontal rows. Groups: 18 vertical columns. chemistry notes ssc
Chemistry is a critical subject in SSC exams, and mastering it requires a comprehensive understanding of concepts, formulas, and reactions. In this article, we provided you with detailed chemistry notes for SSC exams, covering all the essential topics and concepts. Make sure to practice problems, focus on important topics, and use flashcards to memorize key terms and concepts. With dedication and hard work, you can master chemistry and crack the SSC exam with ease.
Solid, Liquid, Gas, Plasma, Bose-Einstein Condensate.
This is one of the most high-yielding topics in the SSC chemistry syllabus. Properties of Acids and Bases Liquefied Petroleum Gas consists mainly of Butane and
Devised by Sorenson. pH 7 is neutral (Pure water). Important Salts: Baking Soda: Sodium Bicarbonate ( NaHCO3cap N a cap H cap C cap O sub 3 Washing Soda: Sodium Carbonate ( Bleaching Powder: Calcium Hypochlorite ( CaOCl2cap C a cap O cap C l sub 2 6. Metals and Non-Metals
Atoms with the same mass number but different atomic numbers (e.g., Argon-40 and Calcium-40). Isotones: Atoms having the same number of neutrons. Types of Chemical Bonds
Chemistry Basics - Atoms, Molecules, Elements, Compounds, and Mixtures Group 17: Halogens (most reactive non-metals)
For aspirants preparing for the Staff Selection Commission (SSC) exams—such as CGL, CHSL, MTS, CPO, or GD—the Science section can often be a game-changer. Among the three core subjects (Physics, Chemistry, Biology), is often perceived as the most scoring, yet memorization-heavy, discipline.
Electronegativity increases across a period and decreases down a group. 4. Acids, Bases, and Salts This is a favorite topic for SSC examiners. Sour taste, turn blue litmus red, pH < 7.
Formed by the mutual sharing of electrons between non-metals. Low melting points. Poor conductors. (e.g., CH4cap C cap H sub 4 H2Ocap H sub 2 cap O
Atoms of different elements containing the same number of neutrons. 3. The Periodic Table
| Substance | Chemical name/formula | Use | |-----------|----------------------|-----| | LPG | Propane + Butane | Fuel | | CNG | Methane (CH₄) | Fuel | | Plaster of Paris | CaSO₄·½H₂O | Casts/statues | | Gypsum | CaSO₄·2H₂O | Cement, POP | | Vinegar | CH₃COOH | Preservative | | Antacid | Mg(OH)₂ / Al(OH)₃ | Acidity relief | | Bleaching powder | CaOCl₂ | Disinfectant/bleach |