CBSE Class 10 Science 2019 Delhi Set 3

© examsnet.com
Question : 7
Total: 9
What is photosynthesis? Explain its mechanism.
Solution:  
The green plants are called autotrophs. They make their own food by the process of photosynthesis.
(i) In this process the plants capture the sun rays by the pigment present in the leave called as chlorophyll.
(ii) Then in the presence of carbondioxide and water they make food for the plants in the form of glucose. In this process oxygen gas is also evolved.
(iii) Conversion of light energy to chemical energy.
(iv) Splitting of water molecules into hydrogen and oxygen.
Equation for the mechanism :
6CO2
Carbondioxide
+6H2O
Sunlight
Chlorophyll
C6H12O6+6O2
Glucose
© examsnet.com
Go to Question: