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C. A pond weed was kept in a bell jar filled with water and the light source was kept at a distance of 10 cm from the plant. After 30 mins the number of bubles evolved per min was recorded. In this context answer :-
a. Name the gas produced by the plant during the experiment.
b. The gas collected comes due to the breakdown of _____________.
c. If ice-cubes are added to the water in the beaker,what will happen to the rate of bubble formation?
d. If lime water is added to the surrounding water, how will it affect the rate of bubble formation?
e. Now the light source was moved at distances 20,40,60,80and 100 cm away from the plant. Draw a graph showing the record of the number of bubbles evolved per min (bubble formed per min is 20 when light source is at 10 cm).
B. Given below is the result of a certain experiment containing 4 testubes filled with:-
Testube A - pond water and then kept in sunlight.
Testube B - pond weed and water snail at 25 degree Celsius.
Testube C - pond weed at 8 degree Celsius.
Testube D - pond weed and testube was wrapped in aluminium foil at 25 degree Celsius.
1. Which of the testube produce maximum oxygen?
2. Which of the testube produce minimum oxygen?
3. What does this experiment show about the effect of light and temperature on the rate of photosynthesis?
A. Rewrite the following statements by inserting a suitable word/words at the right place without deleting any word from the sentence
a. Destarching a plant means removing the starch from the plant.
b. The maximum suitable temperature when photosynthesis works best is about 35 degree above which the leaf get destroyed.
c. The splitting of water molecules into H+and OH- ions is known as photolysis.
d. Volcanic eruptions and hot springs release carbon into atmosphere.
e. Glucose is either immediately used up the cell or is stored.