Download Pdf (Link given below) PHYSICAL CHANGE & CHEMICAL CHANGE Basis Physical Change Chemical Change New substance Not formed Formed Type of change Physical properties change Chemical composition changes State/appearance Size, shape or state changes Entire nature of substance changes Reversibility reversible irreversible Chemical reaction Not a chemical reaction It is a chemical reaction Energy change Very less energy change Energy absorbed or released Chemical bonds No bond breaking or formation Bonds break and new bonds form Mass Mass remains same Mass conserved (reactants = products) Effect on properties No new properties New properties appear Example Melting of ice Rusting of iron CHEMICAL REACTION Process in which new substance are formed with new chemical (may be physical also), is/are formed, is called chemical reaction. *CHARACTERISTISTICS OF CHEMICAL REACTION 1. Evolution of Gas 2. Formation of Precipitate 3. Change in Temperature 4. Change in State 5. Change in Colour DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE LAW OF CONSERVATION OF MASS – Given by Lavoisier in 1774 – It states that: MAKING EQUATIONMORE INFORMATIVE 1. Indicating “Physical State” 2. Indicating heat changes (+heat) 3. Indicating the conditions TYPES OF CHEMICAL REACTION 1. Combination Reaction (A + B = AB) 2. Decomposition Reaction (AB = A + B) #Types of Decomposition Reaction 1)Thermal Decomposition 2)Electro Decomposition 3)Photo Decomposition 3. Displacement Reaction (A + BC = AC + B) More reactive displaces less reactive #Reactivity Series: It is a series in which metals arranged in decreasing order of their reactivities on moving from top to bottom. Trick to Learn: Kaka Nana Chaat Mange Aloo Zara Feke Pade Hai CHAAP. METAL NAME (Reactivity decreases as we move down) Kaka – K (Potassium) Nana – Na (Sodium) Chaat – Ca (calcium) Mange – Mg (Magnesium) Aloo – Al (Aluminium) Zara – Zn (Zinc) Feke – Fe (Iron) Pade – Pb (lead) Hai – H (Hydrogen) C – Cu (Copper) H – Hg (Mercury) A – Ag (Silver) A – Au (Gold) P – Pt (Platinium) Example: 4. Double Displacement Reaction (AB + CD = AC +BD) A reaction in which exchange of ions takes place between two compounds. 5. Redox Reaction A reaction in which oxidation and reduction take place simultaneously. *Reduction: Adding H₂ OR Removing O₂ OR Both *Oxidation: Adding O₂ OR Removing H₂ OR Both DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE EFFECTS OF OXIDATION ON EVERYDAY LIFE 1) CORROSION: Process of slowing eating up of metals due to their conversion into oxides, carbonates, etc by the action of air. *Prevention from Corrosion: 2) RANCIDITY: Fats and Oil present in food get oxidized. *Prevention: IMPORTANT EXPERIMENTS 1) BURNING OF MAGNESIUM 2) CASE OF WHITE WASHING Substance – Calcium Oxide (CaO) * Formation of Slaked Lime When quicklime reacts with water, slaked lime is formed: CaO + H₂O → Ca(OH)₂ This reaction is exothermic (heat is released). * Reaction during Whitewashing When slaked lime is applied on walls, it reacts slowly with carbon dioxide from the air to form calcium carbonate: Ca(OH)₂ + CO₂ → CaCO₃ + H₂O 3) TEST FOR H₂ GAS 4) IRON NAILS IN COPPER SULPHATE SOLUTION 5) RUSTING IS FASTER IN COASTAL AREAS DOWNLOAD PDF of this Short Notes from telegram channel – CLICK HERE Explore other chapter’s NOTES – CLICK HERE or visit Gyanora.in For Practicing chapter wise question answers – CLICK HERE or visit QnA.Gyanora.in Follow us on: YouTube: www.youtube.com/@Gyanora Telegram: t.me/gyanora Instagram: https://www.instagram.com/gyan_ora?igsh=aDQxbDk1aDdleHJ6
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