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प्रश्न
The diagram alongside represents an experiment conducted to prove the importance of a factor in photosynthesis.
Study the same and then answer the questions that follow:
(i) Name the factor being studied in his experiment.
(ii) Why was the plant kept in a dark room before conducting the experiment?
(iii}Why was the experimental leaf then kept in
1. boiling water 2. methylated spirit?
(iv) Name the solution used to test for the presence of starch in the leaf.
(v) What will we observe in the experimental leaf at the end of the starch test?
(vi) Give a balanced chemical equation to represent the process of photosynthesis.
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उत्तर
(i) Sunlight
(ii) To destarch the leaf.
(iii) (1) The leaf was kept in boiling water to kill the cells/ releases the starch grains.
(2) It is kept in methylated spirit to remove chlorophyll.
(iv) Iodine
(v}At the end of the starch test it is observed that the covered part of the leaf remains brown and the exposed part of the leaf remains blue-black.
(vi) \[\ce {6CO2 + 12H2O ->[Sunlight][Chlorophyll]C6H12O6 + 6O2 + 6H2O}\]
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संबंधित प्रश्न
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.
(i) What aspect of photosynthesis was being tested?
(ii) Why was the plant placed in the dark before beginning the experiment?
(iii) During the starch test, why was the leaf
(1) boiled in water
(2) boiled in methylated spirit
(iv) Write a balanced chemical equation to represent the process of photosynthesis.
(v) Draw a neat diagram of a chloroplast and label its parts.
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow :
Explain the process of 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?
During photosynthesis, the oxygen in glucose comes from
Mention one difference between the following on the basis of what is given in bracket.
Respiration and photosynthesis (gas released)
Identify the false statement and rewrite it correctly by changing the first or last word only.
Green plants perform photosynthesis.
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Is there any control in this experiment? If so, state it.
Explain the Term NADPH.
Complete the following sentence with appropriate word:
One of the products of ______of water is oxygen.
Name the minute openings seen on the lower surface of the leaf.
