Question

H. The diagram given below refers to an
experiment in which the apparatus was set
up with the light source 10 cm away from
the plant. After 15 minutes the number of
bubbles evolved per minute from the cut
stem was recorded. The light source was
moved 20 cm away from the plant, left
10 cm - light
source
tap water
for 15 minutes and the number of bubbles
evolved per minute was again recorded. The
experiment was repeated with the light just
at distances of 40, 60, 80 and 100 cm away
from the plant. The results obtained were
recorded on the graph.
Select the correct answer out of the available
choices given under each question,
1. From the graph it seems likely that the rate of
bubbling per minute at 50 cm would have been
a. 2.0. b. 2.5. c. 3.0. d. 3.5. e. 4.0.
2. The gas produced by the plant during the experiment
was
a. helium. b. oxygen. c. carbon dioxide.
d. nitrogen. e. hydrogen.
3. The gas collected comes due to the breakdown of
a. glucose. b. starch. c. water. d. air. e. ATP.
4. If ice cubes were added to the water, the rate of
bubble formation would
a. stay the same.
b. increase because more water is added.
C. decrease because water freezes.
d. cannot tell from the information given.
5. If some sodium bicarbonate is added to the water
the rate of bubble formation
a. increases because more respiration occurs.
b. increases because more photosynthesis occurs.
C. increases because the gas becomes less soluble.
d. decreases because carbon dioxide acts as a
limiting factor.
e. decreases because respiration decreases.​

Answer 1

Answer:

1 a

2 b

3 d

think so answers are correct