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प्रश्न
Why photosynthesis is a chemical reaction?
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उत्तर
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Photosynthesis is a process in which light energy from the sun is used by the plants to prepare starch from carbon dioxide and water.
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The sunlight uses the chemical reaction between carbon dioxide and water, which finally ends up in the production of starch (photo means light and synthesis means production). These chemical reactions used by light are called photochemical reactions.
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संबंधित प्रश्न
Opening a gas cylinder knob converts _____ fuel into ______fuel. This is an example of _____ change.
Spoiling of food is a ______ change.
On immersing an iron nail in CuSO4 solution for a few minutes, you will observe ______.
Match the following
| i. | Quick lime | a. | Calcium hydroxide |
| ii. | Slaked lime | b. | Calcium oxide |
| iii. | Thermolysis | c. | Light |
| iv. | Photochemical | d. | Heat |
Match the following
| i. | Ammonia | a. | Nickel |
| ii. | Dalda | b. | Fermentation |
| iii. | Alcoholic beverages | c. | Biocatalysts |
| iv. | Yeast | d. | Urea |
How is chlorine prepared industrially?
Define the term exothermic and endothermic reactions.
Write a note on catalytic reactions.
Reason out
The speed of a certain reaction is influenced by the catalyst.
Reason out
Chlorine is produced by Brine.
