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प्रश्न
Iron objects undergo rusting when exposed to _______ and _______.
उत्तर
Iron objects undergo rusting when exposed to water and oxygen.
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संबंधित प्रश्न
Burning of matchstick is an example for chemical reaction caused by _______
_______ undergoes rusting.
Which of the following factor induces electrtolysis?
Decomposition of lead nitrate is an example for a chemical reaction caused by light.
Match the following.
| Rusting | Photosynthesis |
| Electrolysis | Haber’s process |
| Thermolysis | Iron |
| Food | Brine |
| Catalysis | Decomposition of limestone |
On heating, calcium carbonate gives calcium oxide and oxygen. Is it an exothermic reaction or an endothermic reaction?
Explain any three conditions that are required for a chemical reaction to take place. Give example.
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?
Chemically rust is ______.
Photochemistry deals with chemical reactions involving light.
