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Question
Given alongside is the diagram of an experimental set-up:

What alteration (s) will you make in it for obtaining expected result?
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Solution
Place potassium hydroxide in the beaker instead of lime water.
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A healthy oat seeding in a pot is transferred from light to any airy but completely dark room. How would it differ from its original condition in appearance after about a week? Explain the difference.
Are the following statement true or false? Give a reason in support of your answer.
Destarching of the leaves of a potted plant can occur only at night.
All life owes its existence to chlorophyll. Give reason.
Given alongside is the diagram of an experimental set-up:

Will it work satisfactorily? Given reason.
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
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Chlorophyll is necessary for photosynthesis.
Choose the correct answer:
Chlorophyll is present
Given below is the diagram of an experimental set-up (final stage). Study the same and answer the following questions:

- What is the main aim of the experiment?
- Oxygen gas shown in the experiment is released from which of the raw materials?
- How would you confirm the presence of oxygen gas?
- Name the chemical substance which can be added in water to enhance the process/rate of release of oxygen gas.
- Draw a neat and labelled diagram of the same experiment for its initial stage.
