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प्रश्न
On a bright sunny day, water weeds growing in an aquarium were actively giving off bubbles of gas. Use this information to answer questions that follow:
- Name the process occurring in the water weed that has resulted in the evolution of these bubbles.
- Of what gas do these bubbles consist?
- Briefly describe the reactions occurring in the leaves of the water weeds leading to the evolution of these bubbles.
- Give an overall balanced chemical equation to represent the process named in (i) above.
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उत्तर
- Photosynthesis.
- Oxygen.
- The process that takes place first in the photolysis of water is H+ and OH- ions with the help of energy from sunlight. The hydroxyl ions combine to form hydrogen peroxide 2OH —> H2O2 which decompose to give molecular oxygen, i.e.,
2H2O2 ——> 2H2O + O2 - \[\ce{6CO2+12H2O ->[Light][ChlorophyII]C6H12O6+6H2O}\]
APPEARS IN
संबंधित प्रश्न
Expand the abbreviation:
ADP
Put a tick (✓ ) against the most appropriate alternative in the following statement.
Which one of the following is an end-product of photosynthesis?
Identify the false statements and rewrite them correctly by changing the first or last word only.
Starch produced in a leaf remains stored in it for 2-3 weeks before it is used by other parts of the plant.
Using the destarched plant describe step by step how would you proceed to prove that in the absence of light the leaf cannot manufacture starch?
A candidate in order to study the importance of certain factors in photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning, she covered one of the leaves with black paper in the center only. She placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.
- What aspect of photosynthesis was being investigated?
- Is there any control in this experiment? If so, state the same.
- Why was the plant kept in the dark before the experiment?
- Describe step by step how the candidate proceeded to test the leaf for the presence of starch.
The gas given out during photosynthesis is _____.
The reactions of photosynthesis make up a biochemical pathway.
What is the end product of light and dark reactions of photosynthesis?
______ food is made in their green stems.
Can the stem of a plant be compared with a street with two-way traffic? Give reason.
The raw material which is reduced during photosynthesis is ______.
