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प्रश्न
Differentiate between the following:
Electrolytic decomposition and photochemical decomposition.
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उत्तर
Electrolytic decomposition and photochemical decomposition:
- Electrolytic decomposition : “A chemical reaction which takes place with absorption of electrical energy”
\[\ce{\underset{\text{collected at}}{2H2O}->[electric][current]\underset{\text{cathode}}{2H2} + \underset{\text{anode}}{O2}}\] - Photochemical decomposition: “A chemical reaction which takes place with the absorption of light energy”
\[\ce{H2 + Cl2->[sunlight]2HCl}\]
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संबंधित प्रश्न
Identify the endothermic and exothermic reaction.
HCl + NaOH → NaCl + H2O + heat
Why energy is involved in a chemical change?
Name a compound which produces carbon dioxide on heating.
Define exothermic and endothermic changes. Give two example in each case.
Supply of energy may be required to initiate a reaction. State the different forms with a suitable example of reactions initiated by the supply of energy.
Select the correct answer from the options given below:
State the gaseous product formed, when
An exothermic reaction takes place between ammonia and neutral gas.
Match the following:
| Colum I | Column II | ||
| 1. | Alloying | a. | Exothermic change |
| 2. | Crystallization | b. | Periodic change |
| 3. | Soap powder + water | c. | Mixing of molten solids |
| 4. | Seasonal changes | d. | Pure solid |
Give examples for the exothermic process.
Give scientific reasons.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is added slowly to water with constant stirring.
