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Decomposition reaction
This document discusses decomposition reactions, where a single compound breaks down into simpler substances. Examples given include lead nitrate decomposing into lead oxide, oxygen, and nitrogen dioxide when heated. Blue copper sulfate pentahydrate also decomposes when heated, forming white copper sulfate and water vapor. Electrolysis and exposure to sunlight are provided as other means for decomposition reactions to occur, such as water decomposing into hydrogen and oxygen during electrolysis or silver chloride decomposing into silver and chlorine in the presence of light.
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Decomposition reaction
- 1. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Decomposition Reaction When a single compound breaks up into two or many simpler substances it is called decomposition reaction. Decomposition Breaking of single compound into simpler substances Subtopic ID: 01.03.02
- 2. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Decomposition Reaction When we heat lead nitrate it becomes lead oxide with the evolution of oxygen gas and 2Pb(NO3)2 Heat 2PbO + 4NO2↑ + O2 ↑ brown fumes of nitrogen dioxide. Brown fumes of nitrogen dioxide Subtopic ID: 01.03.02
- 3. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Decomposition Reaction Watch this experiment and Why does blue copper sulphate answer the question. solution become white on heating? View answer Subtopic ID: 01.03.02
- 4. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Decomposition Reaction Blue copper sulphate . pentahydrate undergoes decomposition on CuSO4.5H2O CuSO4 + 5H2O heating to give white anhydrous copper sulphate and water vapour Subtopic ID: 01.03.02
- 5. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Decomposition Reaction When we introduce electricity Electrolysis using a 9 volts battery, water separates into hydrogen and 2H2O Electrolysis 2H2 + O2 oxygen. This reaction is called electrolysis. It is another example of decomposition reaction. You can observe the evolution of hydrogen gas at cathode and oxygen at anode during the electrolysis of water. The evolution of gas increases when we add a few pinches of table salt. Subtopic ID: 01.03.02
- 6. CBSE - 10 Chemical Reactions and Equations Chemistry Types of Chemical Reactions Decomposition Reaction Silver chloride is sensitive to light. On exposure to sunlight Photochemical Reaction it becomes silver. Since this reaction takes place in presence of sunlight it is also 2AgCl Sunlight 2Ag + Cl2 called photochemical reaction. Subtopic ID: 01.03.02