Advertisements
Advertisements
प्रश्न
How would you demonstrate that green plants release oxygen when exposed to light?
Advertisements
उत्तर
- Place some water plants (Elodea or Hydrilla) in a beaker containing pond water and cover them by a short-stemmed funnel.
- Invert a test tube full of water over the stem of the funnel. (Ensure that the level of water in the beaker is above the level of the stem of the inverted funnel.)
- Place the apparatus in the sun for a few hours (in Fig). Bubbles of the gas will collect in the test tube.
- Test the gas in the test tube. A glowing splinter bursts into flame, which shows the presence of oxygen.
APPEARS IN
संबंधित प्रश्न
The chemical substance used to test the presence of starch in the cell of a leaf is ______.
Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.
Name the biological process which was the starting point of the whole chain.
Given alongside is the diagram of an experimental set-up:
What alteration (s) will you make in it for obtaining expected result?
Chloroplasts are called energy converters.
ATP is needed for the dark reaction.
Name the following:
The green colouring matter of the plants.
Give technical term:
Name only one plant, you are familiar with which has no chlorophyll.
Choose the correct answer:
Chlorophyll is present
Name two plants having variegated leaves.
Match the terms given in column A with column B:
| Column A | Column B | ||
| (a) | Chlorophyll | (i) | Removes/absorbs CO2 |
| (b) | Methylated spirit | (ii) | Tests presence of starch |
| (c) | Potassium hydroxide | (iii) | Traps solar energy |
| (d) | Iodine solution | (iv) | Produces oxygen |
| (e) | Water | (v) | Bleaches chlorophyll |
