Advertisements
Advertisements
प्रश्न
Fig. demonstrates a physiological process taking place in green plants. The whole set-up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow:
- What aspect of the physiological process is being examined?
- Explain the physiological process mentioned in (a) above.
- Label the parts numbered 1 and 2 in the diagram.
- Write a well-balanced chemical equation for the physiological process explained in (b) above.
- What would happen to the rate of bubbling of the gas if a pinch of sodium bicarbonate is added to the water in the beaker? Explain your answer.
Advertisements
उत्तर
- The aspect being examined is the release of oxygen during Photosynthesis.
- Photosynthesis is the process by which living plant cells, containing chlorophyll, produce food substances (glucose and starch) from carbon dioxide and water, using light energy. Plants release oxygen as a by-product during photosynthesis.
- 1: Oxygen
2: Hydrilla plant - \[\ce{6CO2 + 12H2O ->[Light energy][Chlorophyll] C6H12O6 + 6H2O + 6O2 \uparrow}\]
- Sodium bicarbonate releases carbon dioxide into the water, which is made available to the plant. This increases the rate of photosynthesis. So more oxygen is released thus more bubbles are released.
APPEARS IN
संबंधित प्रश्न
Give suitable biological reasons for the following statement :
All life on Earth is supported by Photosynthesis.
An experiment was set up as shown in the figure alongside. Look at the figure and answer the following questions:
( i) What is the objective of this experiment?
( ii ) Which plant is used in this experiment?
( iii ) Which gas is evolved in this process?
( iv ) What will happen to the rate of evolution of this gas if a pinch of sodium
bicarbonate is added?
(v ) What will happen if the apparatus is kept in dark?
Name the following:
The products that are formed as a result of photosynthesis.
Name the following:
The organisms that can be called "natural purifiers" of the air.
Mention one difference between the following on the basis of what is given in bracket.
Respiration and photosynthesis (gas released)
Autotrophs use _____,______ and chlorophyll to prepare their own food.
Planting trees help in decreasing global warming.
Mention four factors required for photosynthesis?
An organism A which cannot move from one place to another makes a simple food B from the substances C and D available in the environment. This food is made in the presence of green-colored substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. Does this food give a blue-black color with iodine solution?
a. What is
- organism A
- food B?
- food H?
b. What are C and D?
c. Name green-colored substance E and organ F.
d. What is the process G?
Study the diagram given below and fill in the blanks with suitable words:
In order to prove that carbon dioxide is necessary for
(a) ______, a potted plant is placed in dark for 48 hours to (b) ______ the leaves. A part of a leaf is inserted into a conical flask containing potassium hydroxide solution. This is to absorb (c) ______ from the flask. The plant is then placed in sunlight for a few hours. The experimental leaf is tested for starch. The part of the leaf that was inside the conical flask turns (d) ______, whereas the part of the left outside turns (e) ______ in colour.
