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प्रश्न
What is pollution?
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उत्तर
Unwanted change in physical, chemical, and biological properties of the environment. This is termed pollution.
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संबंधित प्रश्न
Burning of matchstick is an example for chemical reaction caused by _______
Electrolysis of brine solution gives _______ gases.
Light energy may come out due to chemical reactions.
What happens to the brine during electrolysis?
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.
Chemically rust is ______.
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?
