Bell Jar Experiment

Q.

In the bell jar experiment, the air passing through the lime water turned it milky. What is the inference from this observation?

1. The air drawn in by the pump has carbon dioxide which turns lime water milky.

2. The air drawn in by the pump has oxygen which turns lime water milky.

3. The air drawn in by the pump has hydrogen which turns lime water milky.

4. The air drawn in by the pump has water vapour which turns lime water milky.

Q.

The consumption of seeds of which plant causes slow poisoning?

1. cashew nuts

2. Dhatura

3. Calotropis

4. none of these

Q.

Is bamboo a poisonous plant?

Q.

The following diagram demonstrates a physiological process taking place in green plants. The whole setup was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow:

(i) What aspect of the physiological process is being examined?
(ii) Explain the physiological process mentioned in (i) above.
(iii) Why watch-glass containing potassium hydroxide is kept in A?
(iv) Write a well-balanced chemical equation for the physiological process explained in (ii) above.
(v) What would be the result of the starch test in the case of plant A and plant B?

Q.

This experiment works well even in the presence of the presence of light.

1. False

2. True

Q. In the bell jar experiment, the air passing through the lime water turned it milky. What is the inference from this observation?

1. The air drawn in by the pump has carbon dioxide which turns lime water milky.
2. The air drawn in by the pump has oxygen which turns lime water milky.
3. The air drawn in by the pump has hydrogen which turns lime water milky.
4. The air drawn in by the pump has water vapour which turns lime water milky.

Q. 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?
Figure

Q. Prove that $C{O}_2$ is liberated during aerobic respiration in plants with a diagram.