Question

1. What is the difference between chloroplast and chlorophyll? 2. Write a word and a balanced chemical equation for photosynthesis. 3. What are the raw materials for photosynthesis? Write down the source of these raw materials?

Answer 1

Answer 1. -

Chlorophyll
a) it is a light absorbing plant molecule.
b) it is present inside the chloroplast.
c) it gives green colour to leaves.
d) it converts light energy into chemical energy.

Chloroplast
a) it is a plant organelle.
b) it is present in high amount in plant leaves.
c) chloroplast are green in colour due to the presence of chlorophyll in the .
d) it is the site of both light and dark reactions.

Answer 2.-
Word equation for photosynthesis —
Sunlight
Carbon dioxide + water ———> Oxygen + glucose
Chlorophyll

Chemical equation for photosynthesis —
Sunlight
6CO2 + 6H2O ————> 6O2 + C6H12O6
Chlorophyll

Answer 3.—
Carbon dioxide, water and sunlight are the raw materials for photosynthesis.

Carbon dioxide = it is present in the atmosphere and diffuses into the leaf through stomata.
Water = Water is obtained from the soil. It is absorbed by the roots of the plants.

Sunlight = it is obtained from the sun which gets trapped into the chlorophyll pigment present in the leaves.

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