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प्रश्न
Iron objects undergo rusting when exposed to _______ and _______.
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उत्तर
Iron objects undergo rusting when exposed to water and oxygen.
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Effects of Chemical Changes: Production of Heat, Light, Sound and Pressure
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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?
In Haber’s process of producing ammonia _______ is used as a catalyst.
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 is pollution?
On heating, calcium carbonate gives calcium oxide and oxygen. Is it an exothermic reaction or an endothermic reaction?
Chemically rust is ______.
Photochemistry deals with chemical reactions involving light.
