🔥 C B S E C L AS S 1 0 BOA R D E D I T I O N
SCIENCE
SMART NOTES
High-Yield Strategy & Revision Deck
🧪 Chemistry Cheat Sheet
Reactions, pH Map, Metallurgy & Carbon
🧬 Biology Master Guide
Life Processes, Control, Genetics & Reproduction
⚡ Physics Formula Deck
Ray Diagrams, Mirror/Lens Rules, Ohm's Law
Designed for Android & Mobile Screen View • 2026-27 Board Prep
, C H E M I S T RY • C H A P T E R 0 1
Chemical Reactions & Equations
⚡ 5 Reaction Types Simplified
• Combination: A + B ➔ AB (Exothermic, e.g., Slaking lime)
• Decomposition: AB ➔ A + B (Needs Heat/Light/Elec)
• Displacement: Fe + CuSO₄ ➔ FeSO₄ + Cu (Color change:
Blue ➔ Pale Green)
• Double Disp: Exchange of ions (Forms Precipitate)
• Redox: Oxidation (Gain O / Lose H) + Reduction
🎨 Key Color Changes to Remember
CuSO4 (Blue) + Fe ➔ FeSO4 (Pale Green) + Cu
(Brown)
Pb(NO3)2 Thermal Dec ➔ Brown fumes of NO2 +
Yellow PbO
🎯 HIGH-WEIGHTAGE BOARD PYQ
Q: Balance & identify type: Pb(NO₃)₂ ➔ PbO + NO₂ + O₂
Ans: 2Pb(NO₃)₂ ➔ 2PbO + 4NO₂ + O₂ (g)
Type: Thermal Decomposition. Gives off brown fumes of NO₂ gas.
CBSE Class 10 Science Slide 02
SCIENCE
SMART NOTES
High-Yield Strategy & Revision Deck
🧪 Chemistry Cheat Sheet
Reactions, pH Map, Metallurgy & Carbon
🧬 Biology Master Guide
Life Processes, Control, Genetics & Reproduction
⚡ Physics Formula Deck
Ray Diagrams, Mirror/Lens Rules, Ohm's Law
Designed for Android & Mobile Screen View • 2026-27 Board Prep
, C H E M I S T RY • C H A P T E R 0 1
Chemical Reactions & Equations
⚡ 5 Reaction Types Simplified
• Combination: A + B ➔ AB (Exothermic, e.g., Slaking lime)
• Decomposition: AB ➔ A + B (Needs Heat/Light/Elec)
• Displacement: Fe + CuSO₄ ➔ FeSO₄ + Cu (Color change:
Blue ➔ Pale Green)
• Double Disp: Exchange of ions (Forms Precipitate)
• Redox: Oxidation (Gain O / Lose H) + Reduction
🎨 Key Color Changes to Remember
CuSO4 (Blue) + Fe ➔ FeSO4 (Pale Green) + Cu
(Brown)
Pb(NO3)2 Thermal Dec ➔ Brown fumes of NO2 +
Yellow PbO
🎯 HIGH-WEIGHTAGE BOARD PYQ
Q: Balance & identify type: Pb(NO₃)₂ ➔ PbO + NO₂ + O₂
Ans: 2Pb(NO₃)₂ ➔ 2PbO + 4NO₂ + O₂ (g)
Type: Thermal Decomposition. Gives off brown fumes of NO₂ gas.
CBSE Class 10 Science Slide 02
