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प्रश्न
Give an example of the following chemical changes.
A photochemical reaction involving silver salt.
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उत्तर
\[\ce{2AgNO3->[sunlight] 2Ag + 2NO2 + O2}\]
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संबंधित प्रश्न
Identify the endothermic and exothermic reaction.
\[\ce{CaO + H2O -> Ca(OH)2 + Heat}\]
Give an example of an endothermic reaction.
Chemical reactions may proceed with evolution of heat. Give an example.
Give an example with a balanced equation, of the following reaction:
electrochemical reaction
Select the correct answer from the options given below:
State the gaseous product formed, when
Two gases one of them neutral combines by absorption of light energy.
Assertion: A drop of petrol when touched with finger gives a chill feeling.
Reason: The above phenomenon is an endothermic one.
The Dissolution of glucose in water is also an ______ change.
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 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.
Give scientific reason.
While preparing dilute sulphuric acid from concentrated sulphuric acid in the laboratory, the concentrated sulphuric acid is slowly added to water with constant stirring.
