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प्रश्न
On heating, calcium carbonate gives calcium oxide and oxygen. Is it an exothermic reaction or an endothermic reaction?
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उत्तर
Endothermic reaction.
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संबंधित प्रश्न
_______ undergoes rusting.
In Haber’s process of producing ammonia _______ is used as a catalyst.
Iron objects undergo rusting when exposed to _______ and _______.
Electrolysis of brine solution gives _______ gases.
Formation of slaked lime from quicklime is an endothermic reaction.
Light energy may come out due to chemical reactions.
Match the following.
| Rusting | Photosynthesis |
| Electrolysis | Haber’s process |
| Thermolysis | Iron |
| Food | Brine |
| Catalysis | Decomposition of limestone |
What happens to the brine during electrolysis?
Palanikumar is a Lawyer. He lives in a luxurious flat. Due to high rent, he wants to shift his residence to a place where he has a chemical industry nearby. There the rent is very cheap and the area is less populated also. His son Rajasekar, studying VIII, does not like this and likes to go to some other place.
- Is Rajasekar right in his attitude?
- Why did he refuse to go there?
- What are the values shown by Rajasekar?
Photochemistry deals with chemical reactions involving light.
