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प्रश्न
What is pollution?
एक पंक्ति में उत्तर
उत्तर
Unwanted change in physical, chemical, and biological properties of the environment. This is termed pollution.
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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 _______
Which of the following factor induces electrtolysis?
Iron objects undergo rusting when exposed to _______ and _______.
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 |
Explain any three conditions that are required for a chemical reaction to take place. Give example.
Lead nitrate produces brown gas on heating.
Photochemistry deals with chemical reactions involving light.
Name the nitrate which does not produce brown gas on heating?
